opentelemetry-java: Quadratic CPU consumption in W3C tracestate parsing

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-118259
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-10-28 19:17:30 UTC
Updated2026-10-28 19:17:30 UTC
Descriptionopentelemetry-java is the Java implementation of the OpenTelemetry API for recording telemetry, and SDK for managing telemetry recorded by the API. Prior to 1.67.0, W3CTraceContextPropagator.extract() uses regex delimiter processing that can exhibit quadratic backtracking while parsing tracestate headers containing long runs of spaces or tabs without a following comma. An unauthenticated attacker whose headers reach extraction can repeatedly block request or event-loop threads and cause excessive CPU consumption, with practical impact bounded by ingress header-size limits, proxy configuration, and threading. This issue is fixed in version 1.67.0.

Risk And Classification

Primary CVSS: v3.1 5.3 MEDIUM from [email protected]

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Problem Types: CWE-1333 | CWE-1333 CWE-1333: Inefficient Regular Expression Complexity

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary5.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
3.1CNADECLARED5.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
Low

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Open-telemetry Opentelemetry-java affected < 1.67.0 Not specified

References

ReferenceSourceLinkTags
github.com/open-telemetry/opentelemetry-java/commit/ba4dfea91647d1ef5969... [email protected] github.com
github.com/open-telemetry/opentelemetry-java/commit/cc4f5f22aed0d6936994... [email protected] github.com
github.com/open-telemetry/opentelemetry-java/releases/tag/v1.67.0 [email protected] github.com
github.com/open-telemetry/opentelemetry-java/security/advisories/GHSA-cc... [email protected] github.com
github.com/open-telemetry/opentelemetry-java/pull/8914 [email protected] github.com
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