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26 vulnerabilities found for opentelemetry by opentelemetry
CVE-2026-44967 (GCVE-0-2026-44967)
Vulnerability from nvd – Published: 2026-06-12 14:52 – Updated: 2026-06-12 16:10
VLAI
EPSS
VEX
Title
opentelemetry-cpp: OTLP HTTP exporters read unbounded HTTP response
Summary
OpenTelemetry-cpp is the C++ implementation of OpenTelemetry. Prior to release 1.27.0, the OTLP HTTP exporters (traces/metrics/logs) read the full HTTP response into an in-memory vector of bytes without a size cap. This is exploitable for memory exhaustion when the configured collector endpoint is attacker-controlled (or a network attacker can MITM the exporter connection). This vulnerability is fixed in opentelemetry-cpp release 1.27.0.
Severity
5.3 (Medium)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-789 - Memory Allocation with Excessive Size Value
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/open-telemetry/opentelemetry-c… | x_refsource_CONFIRM |
| https://github.com/open-telemetry/opentelemetry-g… | x_refsource_MISC |
| https://github.com/open-telemetry/opentelemetry-c… | x_refsource_MISC |
| https://github.com/open-telemetry/opentelemetry-c… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| open-telemetry | opentelemetry-cpp |
Affected:
< 1.27.0
|
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CVE-2026-41178 (GCVE-0-2026-41178)
Vulnerability from nvd – Published: 2026-06-04 14:38 – Updated: 2026-06-04 15:46
VLAI
EPSS
VEX
Title
OpenTelemetry-Go's baggage parsing no longer caps raw header length
Summary
OpenTelemetry-Go is the Go implementation of OpenTelemetry. Versions 1.41.0 and 1.43.0 removed raw-length rejection and it causes `Parse` to process arbitrarily large/invalid baggage headers and log errors, enabling DoS via oversized inputs. Versions 1.42.0 and 1.44.0 fix the issue.
Severity
5.3 (Medium)
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-789 - Memory Allocation with Excessive Size Value
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/open-telemetry/opentelemetry-g… | x_refsource_CONFIRM |
| https://github.com/open-telemetry/opentelemetry-g… | x_refsource_MISC |
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| open-telemetry | go.opentelemetry.io/otel/baggage |
Affected:
= 1.41.0
Affected: = 1.43.0 |
|
| open-telemetry | go.opentelemetry.io/otel/propagation |
Affected:
= 1.41.0
Affected: = 1.43.0 |
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CVE-2026-41078 (GCVE-0-2026-41078)
Vulnerability from nvd – Published: 2026-04-23 18:05 – Updated: 2026-04-23 18:52
VLAI
EPSS
VEX
Title
OpenTelemetry dotnet: Potential memory exhaustion via unbounded pooled-list sizing in Jaeger exporter conversion path
Summary
OpenTelemetry dotnet is a dotnet telemetry framework. In 1.6.0-rc.1 and earlier, OpenTelemetry.Exporter.Jaeger may allow sustained memory pressure when the internal pooled-list sizing grows based on a large observed span/tag set and that enlarged size is reused for subsequent allocations. Under high-cardinality or attacker-influenced telemetry input, this can increase memory consumption and potentially cause denial of service. There is no plan to fix this issue as OpenTelemetry.Exporter.Jaeger was deprecated in 2023.
Severity
5.9 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-770 - Allocation of Resources Without Limits or Throttling
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/open-telemetry/opentelemetry-d… | x_refsource_CONFIRM |
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| open-telemetry | opentelemetry-dotnet |
Affected:
<= 1.6.0-rc.1
|
|
| open-telemetry | OpenTelemetry.Exporter.Jaeger |
Affected:
<= 1.6.0-rc.1
|
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}
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CVE-2026-40894 (GCVE-0-2026-40894)
Vulnerability from nvd – Published: 2026-04-23 18:03 – Updated: 2026-04-23 19:22
VLAI
EPSS
VEX
Title
OpenTelemetry dotnet: Excessive memory allocation when parsing OpenTelemetry propagation headers
Summary
OpenTelemetry dotnet is a dotnet telemetry framework. In OpenTelemetry.Api 0.5.0-beta.2 to 1.15.2 and OpenTelemetry.Extensions.Propagators 1.3.1 to 1.15.2, The implementation details of the baggage, B3 and Jaeger processing code in the OpenTelemetry.Api and OpenTelemetry.Extensions.Propagators NuGet packages can allocate excessive memory when parsing which could create a potential denial of service (DoS) in the consuming application. This vulnerability is fixed in 1.15.3.
Severity
5.3 (Medium)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-789 - Memory Allocation with Excessive Size Value
Assigner
References
6 references
| URL | Tags |
|---|---|
| https://github.com/open-telemetry/opentelemetry-d… | x_refsource_CONFIRM |
| https://github.com/open-telemetry/opentelemetry-d… | x_refsource_MISC |
| https://github.com/open-telemetry/opentelemetry-d… | x_refsource_MISC |
| https://github.com/open-telemetry/opentelemetry-d… | x_refsource_MISC |
| https://github.com/open-telemetry/opentelemetry-d… | x_refsource_MISC |
| https://github.com/open-telemetry/opentelemetry-d… | x_refsource_MISC |
Impacted products
3 products
| Vendor | Product | Version | |
|---|---|---|---|
| open-telemetry | opentelemetry-dotnet |
Affected:
>= 0.5.0-beta.2, < 1.15.3
|
|
| open-telemetry | OpenTelemetry.Api |
Affected:
>= 0.5.0-beta.2, < 1.15.3
|
|
| open-telemetry | OpenTelemetry.Extensions.Propagators |
Affected:
>= 1.3.1, < 1.15.3
|
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"vendor": "open-telemetry",
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}
],
"metrics": [
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"attackVector": "NETWORK",
"availabilityImpact": "LOW",
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"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
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},
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"tags": [
"x_refsource_CONFIRM"
],
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},
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"tags": [
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],
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"tags": [
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},
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},
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"tags": [
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],
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}
],
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"discovery": "UNKNOWN"
},
"title": "OpenTelemetry dotnet: Excessive memory allocation when parsing OpenTelemetry propagation headers"
}
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CVE-2026-40891 (GCVE-0-2026-40891)
Vulnerability from nvd – Published: 2026-04-23 17:54 – Updated: 2026-04-23 18:23
VLAI
EPSS
VEX
Title
OpenTelemetry dotnet: Unbounded `grpc-status-details-bin` parsing in OTLP/gRPC retry handling
Summary
OpenTelemetry dotnet is a dotnet telemetry framework. From 1.13.1 to before 1.15.2, When exporting telemetry over gRPC using the OpenTelemetry Protocol (OTLP), the exporter may parse a server-provided grpc-status-details-bin trailer during retry handling. Prior to the fix, a malformed trailer could encode an extremely large length-delimited protobuf field which was used directly for allocation, allowing excessive memory allocation and potential denial of service (DoS). This vulnerability is fixed in 1.15.2.
Severity
5.3 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-789 - Memory Allocation with Excessive Size Value
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/open-telemetry/opentelemetry-d… | x_refsource_CONFIRM |
| https://github.com/open-telemetry/opentelemetry-d… | x_refsource_MISC |
| https://github.com/open-telemetry/opentelemetry-d… | x_refsource_MISC |
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| open-telemetry | opentelemetry-dotnet |
Affected:
>= 1.13.1, < 1.15.3
|
|
| open-telemetry | OpenTelemetry.Exporter.OpenTelemetryProtocol |
Affected:
>= 1.13.1, < 1.15.3
|
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CVE-2026-40182 (GCVE-0-2026-40182)
Vulnerability from nvd – Published: 2026-04-23 17:51 – Updated: 2026-04-23 18:38
VLAI
EPSS
VEX
Title
OpenTelemetry dotnet: OTLP exporter reads unbounded HTTP response bodies
Summary
OpenTelemetry dotnet is a dotnet telemetry framework. From 1.13.1 to before 1.15.2, When exporting telemetry to a back-end/collector over gRPC or HTTP using OpenTelemetry Protocol format (OTLP), if the request results in a unsuccessful request (i.e. HTTP 4xx or 5xx), the response is read into memory with no upper-bound on the number of bytes consumed. This could cause memory exhaustion in the consuming application if the configured back-end/collector endpoint is attacker-controlled (or a network attacker can MitM the connection) and an extremely large body is returned by the response. This vulnerability is fixed in 1.15.2.
Severity
5.3 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-789 - Memory Allocation with Excessive Size Value
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/open-telemetry/opentelemetry-d… | x_refsource_CONFIRM |
| https://github.com/open-telemetry/opentelemetry-d… | x_refsource_MISC |
| https://github.com/open-telemetry/opentelemetry-d… | x_refsource_MISC |
| https://github.com/open-telemetry/opentelemetry-p… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| open-telemetry | opentelemetry-dotnet |
Affected:
>= 1.13.1, < 1.15.2
|
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CVE-2026-39883 (GCVE-0-2026-39883)
Vulnerability from nvd – Published: 2026-04-08 20:26 – Updated: 2026-07-10 12:06
VLAI
EPSS
VEX
Title
OpenTelemetry-Go has an incomplete fix for CVE-2026-24051: BSD kenv command not using absolute path enables PATH hijacking
Summary
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Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
- CWE-426 - Untrusted Search Path
Assigner
References
8 references
| URL | Tags |
|---|---|
| https://github.com/open-telemetry/opentelemetry-g… | x_refsource_CONFIRM |
| http://github.com/open-telemetry/opentelemetry-go… | x_refsource_MISC |
| https://access.redhat.com/security/cve/CVE-2026-39883 | vdb-entryx_refsource_REDHAT |
| https://bugzilla.redhat.com/show_bug.cgi?id=2456718 | issue-trackingx_refsource_REDHAT |
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| https://access.redhat.com/errata/RHSA-2026:37387 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2026:26257 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2026:26254 | vendor-advisoryx_refsource_REDHAT |
Impacted products
3 products
| Vendor | Product | Version | |
|---|---|---|---|
| open-telemetry | opentelemetry-go |
Affected:
>= 1.15.0, < 1.43.0
|
|
| Red Hat | Red Hat Openshift Data Foundation 4.22 |
cpe:/a:redhat:openshift_data_foundation:4.22::el9 |
|
| Red Hat | multicluster engine for Kubernetes 2.8 |
cpe:/a:redhat:multicluster_engine:2.8::el8 |
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CVE-2026-39882 (GCVE-0-2026-39882)
Vulnerability from nvd – Published: 2026-04-08 20:24 – Updated: 2026-04-09 20:22
VLAI
EPSS
VEX
Title
OpenTelemetry-Go OTLP HTTP exporters read unbounded HTTP response bodies
Summary
OpenTelemetry-Go is the Go implementation of OpenTelemetry. Prior to 1.43.0, the otlp HTTP exporters (traces/metrics/logs) read the full HTTP response body into an in-memory bytes.Buffer without a size cap. This is exploitable for memory exhaustion when the configured collector endpoint is attacker-controlled (or a network attacker can mitm the exporter connection). This vulnerability is fixed in 1.43.0.
Severity
5.3 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-789 - Memory Allocation with Excessive Size Value
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/open-telemetry/opentelemetry-g… | x_refsource_CONFIRM |
| https://github.com/open-telemetry/opentelemetry-g… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| open-telemetry | opentelemetry-go |
Affected:
< 1.43.0
|
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CVE-2026-29181 (GCVE-0-2026-29181)
Vulnerability from nvd – Published: 2026-04-07 20:29 – Updated: 2026-06-30 12:07
VLAI
EPSS
VEX
Title
OpenTelemetry-Go multi-value `baggage` header extraction causes excessive allocations (remote dos amplification)
Summary
OpenTelemetry-Go is the Go implementation of OpenTelemetry. From 1.36.0 to 1.40.0, multi-value baggage: header extraction parses each header field-value independently and aggregates members across values. This allows an attacker to amplify cpu and allocations by sending many baggage: header lines, even when each individual value is within the 8192-byte per-value parse limit. This vulnerability is fixed in 1.41.0.
Severity
7.5 (High)
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-770 - Allocation of Resources Without Limits or Throttling
Assigner
References
5 references
| URL | Tags |
|---|---|
| https://github.com/open-telemetry/opentelemetry-g… | x_refsource_CONFIRM |
| https://access.redhat.com/security/cve/CVE-2026-29181 | vdb-entryx_refsource_REDHAT |
| https://bugzilla.redhat.com/show_bug.cgi?id=2456252 | issue-trackingx_refsource_REDHAT |
| https://security.access.redhat.com/data/csaf/v2/v… | x_sadp-csaf-vex |
| https://access.redhat.com/errata/RHSA-2026:25271 | vendor-advisoryx_refsource_REDHAT |
Impacted products
3 products
| Vendor | Product | Version | |
|---|---|---|---|
| open-telemetry | opentelemetry-go |
Affected:
>= 1.36.0, < 1.41.0
|
|
| Red Hat | multicluster engine for Kubernetes 2.11 |
cpe:/a:redhat:multicluster_engine:2.11::el9 |
|
| Red Hat | Multicluster Engine for Kubernetes |
cpe:/a:redhat:multicluster_engine |
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CVE-2026-24051 (GCVE-0-2026-24051)
Vulnerability from nvd – Published: 2026-02-02 19:49 – Updated: 2026-02-03 14:54
VLAI
EPSS
VEX
Title
OpenTelemetry-Go Affected by Arbitrary Code Execution via PATH Hijacking
Summary
OpenTelemetry-Go is the Go implementation of OpenTelemetry. The OpenTelemetry Go SDK in version v1.20.0-1.39.0 is vulnerable to Path Hijacking (Untrusted Search Paths) on macOS/Darwin systems. The resource detection code in sdk/resource/host_id.go executes the ioreg system command using a search path. An attacker with the ability to locally modify the PATH environment variable can achieve Arbitrary Code Execution (ACE) within the context of the application. A fix was released with v1.40.0.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
- CWE-426 - Untrusted Search Path
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/open-telemetry/opentelemetry-g… | x_refsource_CONFIRM |
| https://github.com/open-telemetry/opentelemetry-g… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| open-telemetry | opentelemetry-go |
Affected:
>= 1.21.0, < 1.40.0
|
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CVE-2023-47108 (GCVE-0-2023-47108)
Vulnerability from nvd – Published: 2023-11-10 18:31 – Updated: 2025-10-28 18:22
VLAI
EPSS
VEX
Title
DoS vulnerability in otelgrpc (uncontrolled resource consumption) due to unbound cardinality metrics
Summary
OpenTelemetry-Go Contrib is a collection of third-party packages for OpenTelemetry-Go. Starting in version 0.37.0 and prior to version 0.46.0, the grpc Unary Server Interceptor out of the box adds labels `net.peer.sock.addr` and `net.peer.sock.port` that have unbound cardinality. It leads to the server's potential memory exhaustion when many malicious requests are sent. An attacker can easily flood the peer address and port for requests. Version 0.46.0 contains a fix for this issue. As a workaround to stop being affected, a view removing the attributes can be used. The other possibility is to disable grpc metrics instrumentation by passing `otelgrpc.WithMeterProvider` option with `noop.NewMeterProvider`.
Severity
7.5 (High)
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-770 - Allocation of Resources Without Limits or Throttling
Assigner
References
7 references
| URL | Tags |
|---|---|
| https://github.com/open-telemetry/opentelemetry-g… | x_refsource_CONFIRM |
| https://github.com/open-telemetry/opentelemetry-g… | x_refsource_MISC |
| https://github.com/open-telemetry/opentelemetry-g… | x_refsource_MISC |
| https://github.com/open-telemetry/opentelemetry-g… | x_refsource_MISC |
| https://github.com/open-telemetry/opentelemetry-g… | x_refsource_MISC |
| https://github.com/open-telemetry/opentelemetry-g… | x_refsource_MISC |
| https://pkg.go.dev/go.opentelemetry.io/otel/metri… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| open-telemetry | opentelemetry-go-contrib |
Affected:
>= 0.37.0, < 0.46.0
|
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CVE-2023-45142 (GCVE-0-2023-45142)
Vulnerability from nvd – Published: 2023-10-12 16:33 – Updated: 2025-02-13 17:13
VLAI
EPSS
VEX
Title
OpenTelemetry-Go Contrib has DoS vulnerability in otelhttp due to unbound cardinality metrics
Summary
OpenTelemetry-Go Contrib is a collection of third-party packages for OpenTelemetry-Go. A handler wrapper out of the box adds labels `http.user_agent` and `http.method` that have unbound cardinality. It leads to the server's potential memory exhaustion when many malicious requests are sent to it. HTTP header User-Agent or HTTP method for requests can be easily set by an attacker to be random and long. The library internally uses `httpconv.ServerRequest` that records every value for HTTP `method` and `User-Agent`. In order to be affected, a program has to use the `otelhttp.NewHandler` wrapper and not filter any unknown HTTP methods or User agents on the level of CDN, LB, previous middleware, etc. Version 0.44.0 fixed this issue when the values collected for attribute `http.request.method` were changed to be restricted to a set of well-known values and other high cardinality attributes were removed. As a workaround to stop being affected, `otelhttp.WithFilter()` can be used, but it requires manual careful configuration to not log certain requests entirely. For convenience and safe usage of this library, it should by default mark with the label `unknown` non-standard HTTP methods and User agents to show that such requests were made but do not increase cardinality. In case someone wants to stay with the current behavior, library API should allow to enable it.
Severity
7.5 (High)
CWE
- CWE-770 - Allocation of Resources Without Limits or Throttling
Assigner
References
9 references
| URL | Tags |
|---|---|
| https://github.com/open-telemetry/opentelemetry-g… | x_refsource_CONFIRM |
| https://github.com/open-telemetry/opentelemetry-g… | x_refsource_MISC |
| https://github.com/open-telemetry/opentelemetry-g… | x_refsource_MISC |
| https://github.com/advisories/GHSA-cg3q-j54f-5p7p | x_refsource_MISC |
| https://github.com/open-telemetry/opentelemetry-g… | x_refsource_MISC |
| https://github.com/open-telemetry/opentelemetry-g… | x_refsource_MISC |
| https://github.com/open-telemetry/opentelemetry-g… | x_refsource_MISC |
| https://github.com/open-telemetry/opentelemetry-g… | x_refsource_MISC |
| https://lists.fedoraproject.org/archives/list/pac… |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| open-telemetry | opentelemetry-go-contrib |
Affected:
< 0.44.0
|
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CVE-2023-43810 (GCVE-0-2023-43810)
Vulnerability from nvd – Published: 2023-10-06 13:53 – Updated: 2024-09-19 18:45
VLAI
EPSS
VEX
Title
opentelemetry-instrumentation Denial of Service vulnerability due to unbound cardinality metrics
Summary
OpenTelemetry, also known as OTel for short, is a vendor-neutral open-source Observability framework for instrumenting, generating, collecting, and exporting telemetry data such as traces, metrics, logs. Autoinstrumentation out of the box adds the label `http_method` that has unbound cardinality. It leads to the server's potential memory exhaustion when many malicious requests are sent. HTTP method for requests can be easily set by an attacker to be random and long. In order to be affected program has to be instrumented for HTTP handlers and does not filter any unknown HTTP methods on the level of CDN, LB, previous middleware, etc. This issue has been patched in version 0.41b0.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-400 - Uncontrolled Resource Consumption
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/open-telemetry/opentelemetry-p… | x_refsource_CONFIRM |
| https://github.com/open-telemetry/opentelemetry-p… | x_refsource_MISC |
| https://github.com/open-telemetry/opentelemetry-p… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| open-telemetry | opentelemetry-python-contrib |
Affected:
< 0.41b0
|
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},
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CVE-2026-44967 (GCVE-0-2026-44967)
Vulnerability from cvelistv5 – Published: 2026-06-12 14:52 – Updated: 2026-06-12 16:10
VLAI
EPSS
VEX
Title
opentelemetry-cpp: OTLP HTTP exporters read unbounded HTTP response
Summary
OpenTelemetry-cpp is the C++ implementation of OpenTelemetry. Prior to release 1.27.0, the OTLP HTTP exporters (traces/metrics/logs) read the full HTTP response into an in-memory vector of bytes without a size cap. This is exploitable for memory exhaustion when the configured collector endpoint is attacker-controlled (or a network attacker can MITM the exporter connection). This vulnerability is fixed in opentelemetry-cpp release 1.27.0.
Severity
5.3 (Medium)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-789 - Memory Allocation with Excessive Size Value
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/open-telemetry/opentelemetry-c… | x_refsource_CONFIRM |
| https://github.com/open-telemetry/opentelemetry-g… | x_refsource_MISC |
| https://github.com/open-telemetry/opentelemetry-c… | x_refsource_MISC |
| https://github.com/open-telemetry/opentelemetry-c… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| open-telemetry | opentelemetry-cpp |
Affected:
< 1.27.0
|
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CVE-2026-41178 (GCVE-0-2026-41178)
Vulnerability from cvelistv5 – Published: 2026-06-04 14:38 – Updated: 2026-06-04 15:46
VLAI
EPSS
VEX
Title
OpenTelemetry-Go's baggage parsing no longer caps raw header length
Summary
OpenTelemetry-Go is the Go implementation of OpenTelemetry. Versions 1.41.0 and 1.43.0 removed raw-length rejection and it causes `Parse` to process arbitrarily large/invalid baggage headers and log errors, enabling DoS via oversized inputs. Versions 1.42.0 and 1.44.0 fix the issue.
Severity
5.3 (Medium)
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-789 - Memory Allocation with Excessive Size Value
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/open-telemetry/opentelemetry-g… | x_refsource_CONFIRM |
| https://github.com/open-telemetry/opentelemetry-g… | x_refsource_MISC |
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| open-telemetry | go.opentelemetry.io/otel/baggage |
Affected:
= 1.41.0
Affected: = 1.43.0 |
|
| open-telemetry | go.opentelemetry.io/otel/propagation |
Affected:
= 1.41.0
Affected: = 1.43.0 |
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CVE-2026-41078 (GCVE-0-2026-41078)
Vulnerability from cvelistv5 – Published: 2026-04-23 18:05 – Updated: 2026-04-23 18:52
VLAI
EPSS
VEX
Title
OpenTelemetry dotnet: Potential memory exhaustion via unbounded pooled-list sizing in Jaeger exporter conversion path
Summary
OpenTelemetry dotnet is a dotnet telemetry framework. In 1.6.0-rc.1 and earlier, OpenTelemetry.Exporter.Jaeger may allow sustained memory pressure when the internal pooled-list sizing grows based on a large observed span/tag set and that enlarged size is reused for subsequent allocations. Under high-cardinality or attacker-influenced telemetry input, this can increase memory consumption and potentially cause denial of service. There is no plan to fix this issue as OpenTelemetry.Exporter.Jaeger was deprecated in 2023.
Severity
5.9 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-770 - Allocation of Resources Without Limits or Throttling
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/open-telemetry/opentelemetry-d… | x_refsource_CONFIRM |
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| open-telemetry | opentelemetry-dotnet |
Affected:
<= 1.6.0-rc.1
|
|
| open-telemetry | OpenTelemetry.Exporter.Jaeger |
Affected:
<= 1.6.0-rc.1
|
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CVE-2026-40894 (GCVE-0-2026-40894)
Vulnerability from cvelistv5 – Published: 2026-04-23 18:03 – Updated: 2026-04-23 19:22
VLAI
EPSS
VEX
Title
OpenTelemetry dotnet: Excessive memory allocation when parsing OpenTelemetry propagation headers
Summary
OpenTelemetry dotnet is a dotnet telemetry framework. In OpenTelemetry.Api 0.5.0-beta.2 to 1.15.2 and OpenTelemetry.Extensions.Propagators 1.3.1 to 1.15.2, The implementation details of the baggage, B3 and Jaeger processing code in the OpenTelemetry.Api and OpenTelemetry.Extensions.Propagators NuGet packages can allocate excessive memory when parsing which could create a potential denial of service (DoS) in the consuming application. This vulnerability is fixed in 1.15.3.
Severity
5.3 (Medium)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-789 - Memory Allocation with Excessive Size Value
Assigner
References
6 references
| URL | Tags |
|---|---|
| https://github.com/open-telemetry/opentelemetry-d… | x_refsource_CONFIRM |
| https://github.com/open-telemetry/opentelemetry-d… | x_refsource_MISC |
| https://github.com/open-telemetry/opentelemetry-d… | x_refsource_MISC |
| https://github.com/open-telemetry/opentelemetry-d… | x_refsource_MISC |
| https://github.com/open-telemetry/opentelemetry-d… | x_refsource_MISC |
| https://github.com/open-telemetry/opentelemetry-d… | x_refsource_MISC |
Impacted products
3 products
| Vendor | Product | Version | |
|---|---|---|---|
| open-telemetry | opentelemetry-dotnet |
Affected:
>= 0.5.0-beta.2, < 1.15.3
|
|
| open-telemetry | OpenTelemetry.Api |
Affected:
>= 0.5.0-beta.2, < 1.15.3
|
|
| open-telemetry | OpenTelemetry.Extensions.Propagators |
Affected:
>= 1.3.1, < 1.15.3
|
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}
],
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CVE-2026-40891 (GCVE-0-2026-40891)
Vulnerability from cvelistv5 – Published: 2026-04-23 17:54 – Updated: 2026-04-23 18:23
VLAI
EPSS
VEX
Title
OpenTelemetry dotnet: Unbounded `grpc-status-details-bin` parsing in OTLP/gRPC retry handling
Summary
OpenTelemetry dotnet is a dotnet telemetry framework. From 1.13.1 to before 1.15.2, When exporting telemetry over gRPC using the OpenTelemetry Protocol (OTLP), the exporter may parse a server-provided grpc-status-details-bin trailer during retry handling. Prior to the fix, a malformed trailer could encode an extremely large length-delimited protobuf field which was used directly for allocation, allowing excessive memory allocation and potential denial of service (DoS). This vulnerability is fixed in 1.15.2.
Severity
5.3 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-789 - Memory Allocation with Excessive Size Value
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/open-telemetry/opentelemetry-d… | x_refsource_CONFIRM |
| https://github.com/open-telemetry/opentelemetry-d… | x_refsource_MISC |
| https://github.com/open-telemetry/opentelemetry-d… | x_refsource_MISC |
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| open-telemetry | opentelemetry-dotnet |
Affected:
>= 1.13.1, < 1.15.3
|
|
| open-telemetry | OpenTelemetry.Exporter.OpenTelemetryProtocol |
Affected:
>= 1.13.1, < 1.15.3
|
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CVE-2026-40182 (GCVE-0-2026-40182)
Vulnerability from cvelistv5 – Published: 2026-04-23 17:51 – Updated: 2026-04-23 18:38
VLAI
EPSS
VEX
Title
OpenTelemetry dotnet: OTLP exporter reads unbounded HTTP response bodies
Summary
OpenTelemetry dotnet is a dotnet telemetry framework. From 1.13.1 to before 1.15.2, When exporting telemetry to a back-end/collector over gRPC or HTTP using OpenTelemetry Protocol format (OTLP), if the request results in a unsuccessful request (i.e. HTTP 4xx or 5xx), the response is read into memory with no upper-bound on the number of bytes consumed. This could cause memory exhaustion in the consuming application if the configured back-end/collector endpoint is attacker-controlled (or a network attacker can MitM the connection) and an extremely large body is returned by the response. This vulnerability is fixed in 1.15.2.
Severity
5.3 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-789 - Memory Allocation with Excessive Size Value
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/open-telemetry/opentelemetry-d… | x_refsource_CONFIRM |
| https://github.com/open-telemetry/opentelemetry-d… | x_refsource_MISC |
| https://github.com/open-telemetry/opentelemetry-d… | x_refsource_MISC |
| https://github.com/open-telemetry/opentelemetry-p… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| open-telemetry | opentelemetry-dotnet |
Affected:
>= 1.13.1, < 1.15.2
|
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CVE-2026-39883 (GCVE-0-2026-39883)
Vulnerability from cvelistv5 – Published: 2026-04-08 20:26 – Updated: 2026-07-10 12:06
VLAI
EPSS
VEX
Title
OpenTelemetry-Go has an incomplete fix for CVE-2026-24051: BSD kenv command not using absolute path enables PATH hijacking
Summary
OpenTelemetry-Go is the Go implementation of OpenTelemetry. From 1.15.0 to 1.42.0, the fix for CVE-2026-24051 changed the Darwin ioreg command to use an absolute path but left the BSD kenv command using a bare name, allowing the same PATH hijacking attack on BSD and Solaris platforms. This vulnerability is fixed in 1.43.0.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
- CWE-426 - Untrusted Search Path
Assigner
References
8 references
| URL | Tags |
|---|---|
| https://github.com/open-telemetry/opentelemetry-g… | x_refsource_CONFIRM |
| http://github.com/open-telemetry/opentelemetry-go… | x_refsource_MISC |
| https://access.redhat.com/security/cve/CVE-2026-39883 | vdb-entryx_refsource_REDHAT |
| https://bugzilla.redhat.com/show_bug.cgi?id=2456718 | issue-trackingx_refsource_REDHAT |
| https://security.access.redhat.com/data/csaf/v2/v… | x_sadp-csaf-vex |
| https://access.redhat.com/errata/RHSA-2026:37387 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2026:26257 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2026:26254 | vendor-advisoryx_refsource_REDHAT |
Impacted products
3 products
| Vendor | Product | Version | |
|---|---|---|---|
| open-telemetry | opentelemetry-go |
Affected:
>= 1.15.0, < 1.43.0
|
|
| Red Hat | Red Hat Openshift Data Foundation 4.22 |
cpe:/a:redhat:openshift_data_foundation:4.22::el9 |
|
| Red Hat | multicluster engine for Kubernetes 2.8 |
cpe:/a:redhat:multicluster_engine:2.8::el8 |
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CVE-2026-39882 (GCVE-0-2026-39882)
Vulnerability from cvelistv5 – Published: 2026-04-08 20:24 – Updated: 2026-04-09 20:22
VLAI
EPSS
VEX
Title
OpenTelemetry-Go OTLP HTTP exporters read unbounded HTTP response bodies
Summary
OpenTelemetry-Go is the Go implementation of OpenTelemetry. Prior to 1.43.0, the otlp HTTP exporters (traces/metrics/logs) read the full HTTP response body into an in-memory bytes.Buffer without a size cap. This is exploitable for memory exhaustion when the configured collector endpoint is attacker-controlled (or a network attacker can mitm the exporter connection). This vulnerability is fixed in 1.43.0.
Severity
5.3 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-789 - Memory Allocation with Excessive Size Value
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/open-telemetry/opentelemetry-g… | x_refsource_CONFIRM |
| https://github.com/open-telemetry/opentelemetry-g… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| open-telemetry | opentelemetry-go |
Affected:
< 1.43.0
|
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CVE-2026-29181 (GCVE-0-2026-29181)
Vulnerability from cvelistv5 – Published: 2026-04-07 20:29 – Updated: 2026-06-30 12:07
VLAI
EPSS
VEX
Title
OpenTelemetry-Go multi-value `baggage` header extraction causes excessive allocations (remote dos amplification)
Summary
OpenTelemetry-Go is the Go implementation of OpenTelemetry. From 1.36.0 to 1.40.0, multi-value baggage: header extraction parses each header field-value independently and aggregates members across values. This allows an attacker to amplify cpu and allocations by sending many baggage: header lines, even when each individual value is within the 8192-byte per-value parse limit. This vulnerability is fixed in 1.41.0.
Severity
7.5 (High)
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-770 - Allocation of Resources Without Limits or Throttling
Assigner
References
5 references
| URL | Tags |
|---|---|
| https://github.com/open-telemetry/opentelemetry-g… | x_refsource_CONFIRM |
| https://access.redhat.com/security/cve/CVE-2026-29181 | vdb-entryx_refsource_REDHAT |
| https://bugzilla.redhat.com/show_bug.cgi?id=2456252 | issue-trackingx_refsource_REDHAT |
| https://security.access.redhat.com/data/csaf/v2/v… | x_sadp-csaf-vex |
| https://access.redhat.com/errata/RHSA-2026:25271 | vendor-advisoryx_refsource_REDHAT |
Impacted products
3 products
| Vendor | Product | Version | |
|---|---|---|---|
| open-telemetry | opentelemetry-go |
Affected:
>= 1.36.0, < 1.41.0
|
|
| Red Hat | multicluster engine for Kubernetes 2.11 |
cpe:/a:redhat:multicluster_engine:2.11::el9 |
|
| Red Hat | Multicluster Engine for Kubernetes |
cpe:/a:redhat:multicluster_engine |
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CVE-2026-24051 (GCVE-0-2026-24051)
Vulnerability from cvelistv5 – Published: 2026-02-02 19:49 – Updated: 2026-02-03 14:54
VLAI
EPSS
VEX
Title
OpenTelemetry-Go Affected by Arbitrary Code Execution via PATH Hijacking
Summary
OpenTelemetry-Go is the Go implementation of OpenTelemetry. The OpenTelemetry Go SDK in version v1.20.0-1.39.0 is vulnerable to Path Hijacking (Untrusted Search Paths) on macOS/Darwin systems. The resource detection code in sdk/resource/host_id.go executes the ioreg system command using a search path. An attacker with the ability to locally modify the PATH environment variable can achieve Arbitrary Code Execution (ACE) within the context of the application. A fix was released with v1.40.0.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
- CWE-426 - Untrusted Search Path
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/open-telemetry/opentelemetry-g… | x_refsource_CONFIRM |
| https://github.com/open-telemetry/opentelemetry-g… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| open-telemetry | opentelemetry-go |
Affected:
>= 1.21.0, < 1.40.0
|
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CVE-2023-47108 (GCVE-0-2023-47108)
Vulnerability from cvelistv5 – Published: 2023-11-10 18:31 – Updated: 2025-10-28 18:22
VLAI
EPSS
VEX
Title
DoS vulnerability in otelgrpc (uncontrolled resource consumption) due to unbound cardinality metrics
Summary
OpenTelemetry-Go Contrib is a collection of third-party packages for OpenTelemetry-Go. Starting in version 0.37.0 and prior to version 0.46.0, the grpc Unary Server Interceptor out of the box adds labels `net.peer.sock.addr` and `net.peer.sock.port` that have unbound cardinality. It leads to the server's potential memory exhaustion when many malicious requests are sent. An attacker can easily flood the peer address and port for requests. Version 0.46.0 contains a fix for this issue. As a workaround to stop being affected, a view removing the attributes can be used. The other possibility is to disable grpc metrics instrumentation by passing `otelgrpc.WithMeterProvider` option with `noop.NewMeterProvider`.
Severity
7.5 (High)
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-770 - Allocation of Resources Without Limits or Throttling
Assigner
References
7 references
| URL | Tags |
|---|---|
| https://github.com/open-telemetry/opentelemetry-g… | x_refsource_CONFIRM |
| https://github.com/open-telemetry/opentelemetry-g… | x_refsource_MISC |
| https://github.com/open-telemetry/opentelemetry-g… | x_refsource_MISC |
| https://github.com/open-telemetry/opentelemetry-g… | x_refsource_MISC |
| https://github.com/open-telemetry/opentelemetry-g… | x_refsource_MISC |
| https://github.com/open-telemetry/opentelemetry-g… | x_refsource_MISC |
| https://pkg.go.dev/go.opentelemetry.io/otel/metri… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| open-telemetry | opentelemetry-go-contrib |
Affected:
>= 0.37.0, < 0.46.0
|
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CVE-2023-45142 (GCVE-0-2023-45142)
Vulnerability from cvelistv5 – Published: 2023-10-12 16:33 – Updated: 2025-02-13 17:13
VLAI
EPSS
VEX
Title
OpenTelemetry-Go Contrib has DoS vulnerability in otelhttp due to unbound cardinality metrics
Summary
OpenTelemetry-Go Contrib is a collection of third-party packages for OpenTelemetry-Go. A handler wrapper out of the box adds labels `http.user_agent` and `http.method` that have unbound cardinality. It leads to the server's potential memory exhaustion when many malicious requests are sent to it. HTTP header User-Agent or HTTP method for requests can be easily set by an attacker to be random and long. The library internally uses `httpconv.ServerRequest` that records every value for HTTP `method` and `User-Agent`. In order to be affected, a program has to use the `otelhttp.NewHandler` wrapper and not filter any unknown HTTP methods or User agents on the level of CDN, LB, previous middleware, etc. Version 0.44.0 fixed this issue when the values collected for attribute `http.request.method` were changed to be restricted to a set of well-known values and other high cardinality attributes were removed. As a workaround to stop being affected, `otelhttp.WithFilter()` can be used, but it requires manual careful configuration to not log certain requests entirely. For convenience and safe usage of this library, it should by default mark with the label `unknown` non-standard HTTP methods and User agents to show that such requests were made but do not increase cardinality. In case someone wants to stay with the current behavior, library API should allow to enable it.
Severity
7.5 (High)
CWE
- CWE-770 - Allocation of Resources Without Limits or Throttling
Assigner
References
9 references
| URL | Tags |
|---|---|
| https://github.com/open-telemetry/opentelemetry-g… | x_refsource_CONFIRM |
| https://github.com/open-telemetry/opentelemetry-g… | x_refsource_MISC |
| https://github.com/open-telemetry/opentelemetry-g… | x_refsource_MISC |
| https://github.com/advisories/GHSA-cg3q-j54f-5p7p | x_refsource_MISC |
| https://github.com/open-telemetry/opentelemetry-g… | x_refsource_MISC |
| https://github.com/open-telemetry/opentelemetry-g… | x_refsource_MISC |
| https://github.com/open-telemetry/opentelemetry-g… | x_refsource_MISC |
| https://github.com/open-telemetry/opentelemetry-g… | x_refsource_MISC |
| https://lists.fedoraproject.org/archives/list/pac… |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| open-telemetry | opentelemetry-go-contrib |
Affected:
< 0.44.0
|
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CVE-2023-43810 (GCVE-0-2023-43810)
Vulnerability from cvelistv5 – Published: 2023-10-06 13:53 – Updated: 2024-09-19 18:45
VLAI
EPSS
VEX
Title
opentelemetry-instrumentation Denial of Service vulnerability due to unbound cardinality metrics
Summary
OpenTelemetry, also known as OTel for short, is a vendor-neutral open-source Observability framework for instrumenting, generating, collecting, and exporting telemetry data such as traces, metrics, logs. Autoinstrumentation out of the box adds the label `http_method` that has unbound cardinality. It leads to the server's potential memory exhaustion when many malicious requests are sent. HTTP method for requests can be easily set by an attacker to be random and long. In order to be affected program has to be instrumented for HTTP handlers and does not filter any unknown HTTP methods on the level of CDN, LB, previous middleware, etc. This issue has been patched in version 0.41b0.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-400 - Uncontrolled Resource Consumption
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/open-telemetry/opentelemetry-p… | x_refsource_CONFIRM |
| https://github.com/open-telemetry/opentelemetry-p… | x_refsource_MISC |
| https://github.com/open-telemetry/opentelemetry-p… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| open-telemetry | opentelemetry-python-contrib |
Affected:
< 0.41b0
|
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"value": "OpenTelemetry, also known as OTel for short, is a vendor-neutral open-source Observability framework for instrumenting, generating, collecting, and exporting telemetry data such as traces, metrics, logs. Autoinstrumentation out of the box adds the label `http_method` that has unbound cardinality. It leads to the server\u0027s potential memory exhaustion when many malicious requests are sent. HTTP method for requests can be easily set by an attacker to be random and long. In order to be affected program has to be instrumented for HTTP handlers and does not filter any unknown HTTP methods on the level of CDN, LB, previous middleware, etc. This issue has been patched in version 0.41b0."
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 7.5,
"baseSeverity": "HIGH",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"version": "3.1"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-400",
"description": "CWE-400: Uncontrolled Resource Consumption",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2023-10-06T13:53:17.622Z",
"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"shortName": "GitHub_M"
},
"references": [
{
"name": "https://github.com/open-telemetry/opentelemetry-python-contrib/security/advisories/GHSA-5rv5-6h4r-h22v",
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://github.com/open-telemetry/opentelemetry-python-contrib/security/advisories/GHSA-5rv5-6h4r-h22v"
},
{
"name": "https://github.com/open-telemetry/opentelemetry-python-contrib/commit/6007e0c013071e7f8b9612d3bc68aeb9d600d74e",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/open-telemetry/opentelemetry-python-contrib/commit/6007e0c013071e7f8b9612d3bc68aeb9d600d74e"
},
{
"name": "https://github.com/open-telemetry/opentelemetry-python-contrib/releases/tag/v0.41b0",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/open-telemetry/opentelemetry-python-contrib/releases/tag/v0.41b0"
}
],
"source": {
"advisory": "GHSA-5rv5-6h4r-h22v",
"discovery": "UNKNOWN"
},
"title": "opentelemetry-instrumentation Denial of Service vulnerability due to unbound cardinality metrics"
}
},
"cveMetadata": {
"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"assignerShortName": "GitHub_M",
"cveId": "CVE-2023-43810",
"datePublished": "2023-10-06T13:53:17.622Z",
"dateReserved": "2023-09-22T14:51:42.341Z",
"dateUpdated": "2024-09-19T18:45:01.962Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.1"
}