Common Weakness Enumeration
CWE-789
AllowedMemory Allocation with Excessive Size Value
Abstraction: Variant · Status: Draft
The product allocates memory based on an untrusted, large size value, but it does not ensure that the size is within expected limits, allowing arbitrary amounts of memory to be allocated.
406 vulnerabilities reference this CWE, most recent first.
CVE-2026-47734 (GCVE-0-2026-47734)
Vulnerability from cvelistv5 – Published: 2026-06-10 22:11 – Updated: 2026-06-11 16:14
VLAI
EPSS
VEX
Title
Dulwich has unbounded memory allocation in receive-pack from crafted thin packs
Summary
Dulwich is a pure-Python implementation of the Git file formats and protocols. Starting in version 0.1.0 and prior to version 1.2.5, a client with push access could push a tiny crafted thin pack (~174 bytes) whose delta header declares a huge dest_size. When dulwich ingested it via add_thin_pack / apply_delta, it would allocate hundreds of MB of memory based on that attacker-controlled size, with no relationship to the actual bytes received. Operators running a Dulwich-based Git server that exposes git-receive-pack (i.e. accepts pushes) - for example via dulwich.server functionality, the HTTP smart server, or anything built on ReceivePackHandler - are impacted. The issue is patched in 1.2.5. add_thin_pack now accepts a max_input_size keyword (bytes; 0/None = unlimited, matching git's semantics), and ReceivePackHandler reads receive.maxInputSize from the repository config and passes it through. Wire reads are counted and a PackInputTooLarge exception is raised once the cap is exceeded - equivalent to git index-pack --max-input-size. Users should upgrade to Dulwich 1.2.5 or later and set receive.maxInputSize in their server's repository config to a sane bound for their environment. On unpatched versions, receive.maxInputSize has no effect, so it cannot be used as a workaround. Until upgrading, operators should restrict dulwich-receive-pack (push) access to trusted, authenticated clients only, or disable it entirely on servers that only need to serve fetches and/or run the server under an OS-level memory limit (e.g. ulimit, cgroups/MemoryMax, or a container memory limit) so a malicious push is killed rather than taking down the host.
Severity
5.7 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-11 14:08 UTC
CWE
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/jelmer/dulwich/security/adviso… | x_refsource_CONFIRM |
| https://github.com/jelmer/dulwich/releases/tag/du… | x_refsource_MISC |
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CVE-2026-47667 (GCVE-0-2026-47667)
Vulnerability from cvelistv5 – Published: 2026-07-21 19:57 – Updated: 2026-07-23 14:13
VLAI
EPSS
VEX
Title
CImg Library: Uncontrolled Memory Allocation and Memory Leak in `_load_analyze()` via Crafted NIfTI/Analyze Header
Summary
CImg Library is a C++ library for image processing. Prior to version 4.0.0 in `_load_analyze()`, the header_size field is read as an `unsigned int` from the first 4 bytes of an Analyze/NIfTI file and passed directly to `new unsigned char[header_size]` without being bounded against the actual file size. A value up to ~4 GB is accepted. If the subsequent `fread` returns `short` as it will for any malformed file), the function throws a `CImgIOException` and the allocated buffer is never freed. A 6-byte crafted file is sufficient to trigger an allocation of ~1.3 GB per call, with the full allocation leaked on every error path. The issue is reachable via `load_analyze()` and the generic `load()` when the file extension is .hdr, .img, or .nii. Version 4.0.0 fixes the issue.
Severity
7.5 (High)
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-23 14:12 UTC
CWE
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/GreycLab/CImg/security/advisor… | x_refsource_CONFIRM |
| https://github.com/GreycLab/CImg/issues/480 | x_refsource_MISC |
| https://github.com/GreycLab/CImg/commit/6a69bf725… | x_refsource_MISC |
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CVE-2026-47319 (GCVE-0-2026-47319)
Vulnerability from cvelistv5 – Published: 2026-06-04 09:39 – Updated: 2026-06-08 05:31
VLAI
EPSS
VEX
Summary
Memory allocation with excessive size value vulnerability in Samsung Open Source rlottie allows Excessive Allocation.
This issue affects rlottie: before 0b4e308fa88c72cbb60cc8a2c1d2c2ad89b101dd.
Severity
6.1 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-04 12:18 UTC
CWE
- CWE-789 - Memory allocation with excessive size value
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Samsung Open Source | rlottie |
Unaffected:
0b4e308fa88c72cbb60cc8a2c1d2c2ad89b101dd
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CVE-2026-47313 (GCVE-0-2026-47313)
Vulnerability from cvelistv5 – Published: 2026-05-19 06:28 – Updated: 2026-05-19 13:18
VLAI
EPSS
VEX
Summary
Memory allocation with excessive size value vulnerability in Samsung Open Source Escargot allows Excessive Allocation.
This issue affects Escargot: 590345cc6258317c5da850d846ce6baaf2afc2d3.
Severity
5.5 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-05-19 13:17 UTC
CWE
- CWE-789 - Memory allocation with excessive size value
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Samsung Open Source | Escargot |
Affected:
590345cc6258317c5da850d846ce6baaf2afc2d3
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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 · CISA-ADP (v2.0.3)
Decision recorded 2026-06-12 16:10 UTC
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-2026-44630 (GCVE-0-2026-44630)
Vulnerability from cvelistv5 – Published: 2026-08-10 09:25 – Updated: 2026-08-12 15:54
VLAI
EPSS
VEX
Title
Apache IoTDB: RPC service denial of service via unchecked Thrift string length
Summary
Improper validation of length fields in the Apache IoTDB RPC service may allow a remote unauthenticated attacker to cause a denial of service. By sending a crafted malformed Thrift frame, an attacker can cause IoTDB to allocate an excessive amount of memory and crash with an OutOfMemoryError.
This issue affects Apache IoTDB: before 1.3.8, from 2.0.0 before 2.0.9.
Users are recommended to upgrade to version 2.0.10, which fixes the issue.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-12 15:54 UTC
CWE
Assigner
References
2 references
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Apache Software Foundation | Apache IoTDB |
Affected:
0 , < 1.3.8
(semver)
Affected: 2.0.0 , < 2.0.10 (semver) |
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CVE-2026-44453 (GCVE-0-2026-44453)
Vulnerability from cvelistv5 – Published: 2026-07-16 23:04 – Updated: 2026-07-17 14:29
VLAI
EPSS
VEX
Title
h2o is vulnerable to musl libc stack overflow
Summary
h2o is an HTTP server with support for HTTP/1.x, HTTP/2 and HTTP/3. Prior to commit 6b5370d, h2o is vulnerable to a Denial of Service attack when calling alloca under certain conditions. When serving static files, h2o builds the file path on stack, by calling alloca. The maximum size of the memory allocated using alloca can be as huge as ~600KB, which exceeds the default pthread stack size used by musl libc (128KB). If the amount of memory allocated by alloca exceeds the stack size, the h2o server crashes with a segmentation fault, while it tries to touch the guard page. This issue has been fixed by commit 6b5370d.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-17 14:29 UTC
CWE
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/h2o/h2o/security/advisories/GH… | x_refsource_CONFIRM |
| https://github.com/h2o/h2o/commit/6b5370d9d09fcf8… | x_refsource_MISC |
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CVE-2026-44375 (GCVE-0-2026-44375)
Vulnerability from cvelistv5 – Published: 2026-05-14 14:32 – Updated: 2026-05-14 16:02
VLAI
EPSS
VEX
Title
Nerdbank.MessagePack: Attacker-controlled stackalloc in DateTime decoding causes process-terminating StackOverflowException
Summary
Nerdbank.MessagePack is a NativeAOT-compatible MessagePack serialization library. Prior to 1.1.62, Nerdbank.MessagePack contains an uncontrolled stack allocation vulnerability in DateTime decoding. A malicious MessagePack payload can declare an oversized timestamp extension length, causing the reader to allocate an attacker-controlled number of bytes on the stack. This can trigger a StackOverflowException, which is not catchable by user code and terminates the process. This vulnerability is fixed in 1.1.62.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-05-14 16:01 UTC
CWE
- CWE-789 - Memory Allocation with Excessive Size Value
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/AArnott/Nerdbank.MessagePack/s… | x_refsource_CONFIRM |
| https://github.com/AArnott/Nerdbank.MessagePack/p… | x_refsource_MISC |
| https://github.com/AArnott/Nerdbank.MessagePack/c… | x_refsource_MISC |
| https://github.com/AArnott/Nerdbank.MessagePack/r… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| AArnott | Nerdbank.MessagePack |
Affected:
< 1.1.62
|
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CVE-2026-44253 (GCVE-0-2026-44253)
Vulnerability from cvelistv5 – Published: 2026-08-19 16:06 – Updated: 2026-08-25 02:13
VLAI
EPSS
VEX
Title
Wazuh: Cluster Protocol Memory Exhaustion (DoS) via unbounded receive_str allocation and div_msg_box accumulation
Summary
Wazuh is a free and open source platform used for threat prevention, detection, and response. From 3.9.0 until 4.14.5 and 5.0.0-beta2, the Wazuh cluster protocol in framework/wazuh/core/cluster/common.py allows an authenticated cluster node to exhaust memory on the master. The receive_str() method accepts an attacker-controlled total for InBuffer without a maximum, so a new_str command can request a multi-gigabyte bytearray and repeated requests accumulate in in_str. The divided-message path also retains flag_divided fragments under unique counters in div_msg_box without a count, aggregate-size, or expiration limit. Exploitation can disrupt agent connectivity and alert processing across the monitored environment. This issue is fixed in versions 4.14.5 and 5.0.0-beta2.
Severity
4.9 (Medium)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-25 02:13 UTC
CWE
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/wazuh/wazuh/security/advisorie… | x_refsource_CONFIRM |
| https://github.com/wazuh/wazuh/pull/35173 | x_refsource_MISC |
| https://github.com/wazuh/wazuh/commit/d29c5c89a0e… | x_refsource_MISC |
| https://github.com/wazuh/wazuh/releases/tag/v4.14.5 | x_refsource_MISC |
Impacted products
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CVE-2026-43868 (GCVE-0-2026-43868)
Vulnerability from cvelistv5 – Published: 2026-05-05 07:49 – Updated: 2026-07-22 12:08
VLAI
EPSS
VEX
Title
Apache Thrift: Rust implementation vulnerable to CVE-2020-13949 pattern
Summary
Memory Allocation with Excessive Size Value vulnerability in Apache Thrift.
This issue affects Apache Thrift: before 0.23.0.
Users are recommended to upgrade to version 0.23.0, which fixes the issue.
Severity
5.3 (Medium)
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-05-05 19:14 UTC
CWE
Assigner
References
6 references
| URL | Tags |
|---|---|
| https://lists.apache.org/thread/zj76dtwnbbs1m7z3f… | vendor-advisory |
| https://access.redhat.com/security/cve/CVE-2026-43868 | vdb-entryx_refsource_REDHAT |
| https://bugzilla.redhat.com/show_bug.cgi?id=2466670 | issue-trackingx_refsource_REDHAT |
| https://security.access.redhat.com/data/csaf/v2/v… | x_sadp-csaf-vex |
| https://access.redhat.com/errata/RHSA-2026:26586 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2026:42644 | vendor-advisoryx_refsource_REDHAT |
Impacted products
10 products
| Vendor | Product | Version | |
|---|---|---|---|
| Apache Software Foundation | Apache Thrift |
Affected:
0 , < 0.23.0
(semver)
|
|
| Red Hat | Red Hat Build of Apache Camel 3.33 for Quarkus 3.33.2.SP1 |
cpe:/a:redhat:apache_camel_quarkus:3.33
|
|
| Red Hat | Red Hat OpenShift AI 2.25 |
Unaffected:
1783443816 , < *
(rpm)
cpe:/a:redhat:openshift_ai:2.25::el9 |
|
| Red Hat | Red Hat AI Inference Server |
cpe:/a:redhat:ai_inference_server:3
|
|
| Red Hat | Red Hat build of Apache Camel 4 for Quarkus 3 |
cpe:/a:redhat:camel_quarkus:3
|
|
| Red Hat | Red Hat Data Grid 8 |
cpe:/a:redhat:jboss_data_grid:8
|
|
| Red Hat | Red Hat Enterprise Linux AI (RHEL AI) 3 |
cpe:/a:redhat:enterprise_linux_ai:3
|
|
| Red Hat | Red Hat Fuse 7 |
cpe:/a:redhat:jboss_fuse:7
|
|
| Red Hat | Red Hat JBoss Enterprise Application Platform Expansion Pack |
cpe:/a:redhat:jbosseapxp
|
|
| Red Hat | Red Hat OpenShift AI (RHOAI) |
cpe:/a:redhat:openshift_ai
|
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"vendor": "Red Hat"
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"packageName": "rhaii/vllm-gaudi-rhel9",
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"vendor": "Red Hat"
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"packageName": "rhaii/vllm-neuron-rhel9",
"product": "Red Hat AI Inference Server",
"vendor": "Red Hat"
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"product": "Red Hat AI Inference Server",
"vendor": "Red Hat"
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"vendor": "Red Hat"
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"cpes": [
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"packageName": "libthrift",
"product": "Red Hat build of Apache Camel 4 for Quarkus 3",
"vendor": "Red Hat"
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{
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"cpes": [
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"packageName": "libthrift",
"product": "Red Hat Data Grid 8",
"vendor": "Red Hat"
},
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"cpes": [
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"packageName": "rhelai3/bootc-aws-cuda-rhel9",
"product": "Red Hat Enterprise Linux AI (RHEL AI) 3",
"vendor": "Red Hat"
},
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"packageName": "rhelai3/bootc-azure-cuda-rhel9",
"product": "Red Hat Enterprise Linux AI (RHEL AI) 3",
"vendor": "Red Hat"
},
{
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"packageName": "rhelai3/bootc-azure-rocm-rhel9",
"product": "Red Hat Enterprise Linux AI (RHEL AI) 3",
"vendor": "Red Hat"
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"cpes": [
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"packageName": "rhelai3/bootc-cuda-rhel9",
"product": "Red Hat Enterprise Linux AI (RHEL AI) 3",
"vendor": "Red Hat"
},
{
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"cpes": [
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],
"defaultStatus": "unaffected",
"packageName": "rhelai3/bootc-gaudi-rhel9",
"product": "Red Hat Enterprise Linux AI (RHEL AI) 3",
"vendor": "Red Hat"
},
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"product": "Red Hat JBoss Enterprise Application Platform Expansion Pack",
"vendor": "Red Hat"
},
{
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"cpes": [
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],
"defaultStatus": "unaffected",
"packageName": "rhai/base-image-cpu-rhel9",
"product": "Red Hat OpenShift AI (RHOAI)",
"vendor": "Red Hat"
},
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"product": "Red Hat OpenShift AI (RHOAI)",
"vendor": "Red Hat"
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],
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"packageName": "rhai/base-image-gaudi-rhel9",
"product": "Red Hat OpenShift AI (RHOAI)",
"vendor": "Red Hat"
},
{
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"cpes": [
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],
"defaultStatus": "unaffected",
"packageName": "rhai/base-image-neuron-rhel9",
"product": "Red Hat OpenShift AI (RHOAI)",
"vendor": "Red Hat"
},
{
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Mitigation
Implementation
Architecture and Design
Perform adequate input validation against any value that influences the amount of memory that is allocated. Define an appropriate strategy for handling requests that exceed the limit, and consider supporting a configuration option so that the administrator can extend the amount of memory to be used if necessary.
Mitigation
Operation
Run your program using system-provided resource limits for memory. This might still cause the program to crash or exit, but the impact to the rest of the system will be minimized.
No CAPEC attack patterns related to this CWE.