RHSA-2026:54440
Vulnerability from csaf_redhat - Published: 2026-08-12 22:01 - Updated: 2026-08-12 22:04A flaw was found in jackson-databind, a general-purpose data-binding library for Jackson Data Processor. A remote attacker can exploit this vulnerability by sending deeply nested JSON (JavaScript Object Notation) data to a service that reads and processes it. This can lead to a Denial of Service (DoS) by consuming significant system resources, making the service unavailable to legitimate users.
| Product | Identifier | Version | Remediation |
|---|---|---|---|
| Unresolved product id: Red Hat Lightspeed (formerly Insights) for Runtimes 1.0:registry.redhat.io/rh-lightspeed-runtimes/runtimes-agent-init-rhel9@sha256:5281c5150f8c786098bbaf43d036ca89ed21cf2bf68f09236de82fda4740dd27_s390x | — |
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| Unresolved product id: Red Hat Lightspeed (formerly Insights) for Runtimes 1.0:registry.redhat.io/rh-lightspeed-runtimes/runtimes-agent-init-rhel9@sha256:5e413617445a6f5b238d5b45dae157df63c974b5a0262bce8754cdd3296f86a3_arm64 | — |
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| Unresolved product id: Red Hat Lightspeed (formerly Insights) for Runtimes 1.0:registry.redhat.io/rh-lightspeed-runtimes/runtimes-agent-init-rhel9@sha256:a2dd47734aa704b52c3ff8c9101c8309ea5647abf5d0b6d5a4e38627270f3d61_ppc64le | — |
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| Unresolved product id: Red Hat Lightspeed (formerly Insights) for Runtimes 1.0:registry.redhat.io/rh-lightspeed-runtimes/runtimes-agent-init-rhel9@sha256:a6fc33e05610c80a5f2be7589394eaf9ea7e85568d001c601a214535df7e9a85_amd64 | — |
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A flaw was found in jackson-databind. This vulnerability allows a remote attacker to bypass the PolymorphicTypeValidator (PTV) when polymorphic typing is enabled and a type identifier contains generic parameters. By crafting a malicious type ID, an attacker can place a denied class as a generic type parameter of an allowed container. This leads to the loading and instantiation of arbitrary classes, potentially resulting in arbitrary code execution.
| Product | Identifier | Version | Remediation |
|---|---|---|---|
| Unresolved product id: Red Hat Lightspeed (formerly Insights) for Runtimes 1.0:registry.redhat.io/rh-lightspeed-runtimes/runtimes-agent-init-rhel9@sha256:5281c5150f8c786098bbaf43d036ca89ed21cf2bf68f09236de82fda4740dd27_s390x | — |
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| Unresolved product id: Red Hat Lightspeed (formerly Insights) for Runtimes 1.0:registry.redhat.io/rh-lightspeed-runtimes/runtimes-agent-init-rhel9@sha256:5e413617445a6f5b238d5b45dae157df63c974b5a0262bce8754cdd3296f86a3_arm64 | — |
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| Unresolved product id: Red Hat Lightspeed (formerly Insights) for Runtimes 1.0:registry.redhat.io/rh-lightspeed-runtimes/runtimes-agent-init-rhel9@sha256:a2dd47734aa704b52c3ff8c9101c8309ea5647abf5d0b6d5a4e38627270f3d61_ppc64le | — |
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| Unresolved product id: Red Hat Lightspeed (formerly Insights) for Runtimes 1.0:registry.redhat.io/rh-lightspeed-runtimes/runtimes-agent-init-rhel9@sha256:a6fc33e05610c80a5f2be7589394eaf9ea7e85568d001c601a214535df7e9a85_amd64 | — |
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A flaw was found in jackson-databind. When Java Records use a PropertyNamingStrategy, an attacker can bypass the @JsonIgnore annotation during deserialization. This allows a renamed JSON key to be assigned to a Record constructor parameter, even if it was intended to be ignored. Consequently, an untrusted client could set internal or privileged components from external input, potentially leading to unauthorized modification or disclosure of sensitive data.
| Product | Identifier | Version | Remediation |
|---|---|---|---|
| Unresolved product id: Red Hat Lightspeed (formerly Insights) for Runtimes 1.0:registry.redhat.io/rh-lightspeed-runtimes/runtimes-agent-init-rhel9@sha256:5281c5150f8c786098bbaf43d036ca89ed21cf2bf68f09236de82fda4740dd27_s390x | — |
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| Unresolved product id: Red Hat Lightspeed (formerly Insights) for Runtimes 1.0:registry.redhat.io/rh-lightspeed-runtimes/runtimes-agent-init-rhel9@sha256:5e413617445a6f5b238d5b45dae157df63c974b5a0262bce8754cdd3296f86a3_arm64 | — |
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| Unresolved product id: Red Hat Lightspeed (formerly Insights) for Runtimes 1.0:registry.redhat.io/rh-lightspeed-runtimes/runtimes-agent-init-rhel9@sha256:a2dd47734aa704b52c3ff8c9101c8309ea5647abf5d0b6d5a4e38627270f3d61_ppc64le | — |
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| Unresolved product id: Red Hat Lightspeed (formerly Insights) for Runtimes 1.0:registry.redhat.io/rh-lightspeed-runtimes/runtimes-agent-init-rhel9@sha256:a6fc33e05610c80a5f2be7589394eaf9ea7e85568d001c601a214535df7e9a85_amd64 | — |
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A flaw was found in jackson-core. A remote attacker can exploit an incomplete fix in the non-blocking JSON parser by streaming specially crafted JSON data in small chunks. This bypasses the intended number length constraint, causing the parser to accumulate excessive memory per connection. This uncontrolled memory growth can lead to a denial of service (DoS) by exhausting the Java Virtual Machine (JVM) heap.
| Product | Identifier | Version | Remediation |
|---|---|---|---|
| Unresolved product id: Red Hat Lightspeed (formerly Insights) for Runtimes 1.0:registry.redhat.io/rh-lightspeed-runtimes/runtimes-agent-init-rhel9@sha256:5281c5150f8c786098bbaf43d036ca89ed21cf2bf68f09236de82fda4740dd27_s390x | — |
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| Unresolved product id: Red Hat Lightspeed (formerly Insights) for Runtimes 1.0:registry.redhat.io/rh-lightspeed-runtimes/runtimes-agent-init-rhel9@sha256:5e413617445a6f5b238d5b45dae157df63c974b5a0262bce8754cdd3296f86a3_arm64 | — |
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| Unresolved product id: Red Hat Lightspeed (formerly Insights) for Runtimes 1.0:registry.redhat.io/rh-lightspeed-runtimes/runtimes-agent-init-rhel9@sha256:a2dd47734aa704b52c3ff8c9101c8309ea5647abf5d0b6d5a4e38627270f3d61_ppc64le | — |
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| Unresolved product id: Red Hat Lightspeed (formerly Insights) for Runtimes 1.0:registry.redhat.io/rh-lightspeed-runtimes/runtimes-agent-init-rhel9@sha256:a6fc33e05610c80a5f2be7589394eaf9ea7e85568d001c601a214535df7e9a85_amd64 | — |
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"ids": [
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"text": "A flaw was found in jackson-databind, a general-purpose data-binding library for Jackson Data Processor. A remote attacker can exploit this vulnerability by sending deeply nested JSON (JavaScript Object Notation) data to a service that reads and processes it. This can lead to a Denial of Service (DoS) by consuming significant system resources, making the service unavailable to legitimate users.",
"title": "Vulnerability description"
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"title": "Vulnerability summary"
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"text": "This is an Important denial-of-service flaw in jackson-databind, affecting services that process deeply nested JSON data. Exploitation occurs when a service reads JSON as `JsonNode` and subsequently writes it back using `JsonNode.toString()`, leading to excessive resource consumption and potential service unavailability.",
"title": "Statement"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
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"notes": [
{
"category": "description",
"text": "A flaw was found in jackson-core. A remote attacker can exploit an incomplete fix in the non-blocking JSON parser by streaming specially crafted JSON data in small chunks. This bypasses the intended number length constraint, causing the parser to accumulate excessive memory per connection. This uncontrolled memory growth can lead to a denial of service (DoS) by exhausting the Java Virtual Machine (JVM) heap.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "com.fasterxml.jackson.core/jackson-core: tools.jackson.core/jackson-core: jackson-core: Denial of Service via incomplete fix in async JSON parser",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "This is an Important denial of service vulnerability in `jackson-core`\u0027s asynchronous JSON parser. A remote, unauthenticated attacker can exploit an incomplete fix to bypass number length constraints, leading to unbounded memory accumulation and potential JVM heap exhaustion in reactive frameworks processing chunked JSON input.",
"title": "Statement"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
],
"product_status": {
"fixed": [
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]
},
"references": [
{
"category": "self",
"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2026-68494"
},
{
"category": "external",
"summary": "RHBZ#2511026",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2511026"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2026-68494",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-68494"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-68494",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-68494"
},
{
"category": "external",
"summary": "https://github.com/FasterXML/jackson-core/commit/050b429804dce2a7e08f0be1b0b4c3d040fdb9cd",
"url": "https://github.com/FasterXML/jackson-core/commit/050b429804dce2a7e08f0be1b0b4c3d040fdb9cd"
},
{
"category": "external",
"summary": "https://github.com/FasterXML/jackson-core/commit/4cdd529749da396cc7edf6d4a2aad41d47902641",
"url": "https://github.com/FasterXML/jackson-core/commit/4cdd529749da396cc7edf6d4a2aad41d47902641"
},
{
"category": "external",
"summary": "https://github.com/FasterXML/jackson-core/commit/c5941e5aae7fd5aeac55d66933cfb82b9aabeef8",
"url": "https://github.com/FasterXML/jackson-core/commit/c5941e5aae7fd5aeac55d66933cfb82b9aabeef8"
},
{
"category": "external",
"summary": "https://github.com/FasterXML/jackson-core/pull/1611",
"url": "https://github.com/FasterXML/jackson-core/pull/1611"
},
{
"category": "external",
"summary": "https://github.com/FasterXML/jackson-core/security/advisories/GHSA-r7wm-3cxj-wff9",
"url": "https://github.com/FasterXML/jackson-core/security/advisories/GHSA-r7wm-3cxj-wff9"
},
{
"category": "external",
"summary": "https://github.com/advisories/GHSA-72hv-8253-57qq",
"url": "https://github.com/advisories/GHSA-72hv-8253-57qq"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2026-18401",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-18401"
}
],
"release_date": "2026-08-04T14:39:14.471000+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2026-08-12T22:01:08+00:00",
"details": "Before applying this update, make sure all previously released errata relevant to your system have been applied.\n\nFor details on how to apply this update, refer to:\n\nhttps://access.redhat.com/articles/11258",
"product_ids": [
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],
"restart_required": {
"category": "none"
},
"url": "https://access.redhat.com/errata/RHSA-2026:54440"
}
],
"scores": [
{
"cvss_v3": {
"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"
},
"products": [
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}
],
"threats": [
{
"category": "impact",
"details": "Important"
}
],
"title": "com.fasterxml.jackson.core/jackson-core: tools.jackson.core/jackson-core: jackson-core: Denial of Service via incomplete fix in async JSON parser"
}
]
}
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.