CVE-2026-118259
opentelemetry-java: Quadratic CPU consumption in W3C tracestate parsing
- Published
- Updated
- Reserved
- Assigned by
- GitHub_M
Description
opentelemetry-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.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| GitHub_MCNA (assigner) | 3.1 | Medium5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L |
| NVDNVD · Awaiting Analysis | 3.1 | Medium5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L |
- EPSS (exploitation in 30 days)
- 0.49% · top 58% of all CVEs (6 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: yes · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.3.
Weakness
Affected products
open-telemetry · opentelemetry-java
- affected < 1.67.0
Affected packages
From reviewed advisories of the GitHub Advisory Database.
- Mavenio.opentelemetry:opentelemetry-apiGHSA-ccrj-gw8r-854m (opens in a new tab)
References (5)
- https://github.com/open-telemetry/opentelemetry-java/security/advisories/GHSA-ccrj-gw8r-854m (opens in a new tab)x_refsource_CONFIRM
- https://github.com/open-telemetry/opentelemetry-java/pull/8914 (opens in a new tab)x_refsource_MISC
- https://github.com/open-telemetry/opentelemetry-java/commit/ba4dfea91647d1ef596975db5d7197681df3c0f5 (opens in a new tab)x_refsource_MISC
- https://github.com/open-telemetry/opentelemetry-java/commit/cc4f5f22aed0d69369941cde8029e73507cf438f (opens in a new tab)x_refsource_MISC
- https://github.com/open-telemetry/opentelemetry-java/releases/tag/v1.67.0 (opens in a new tab)x_refsource_MISC
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisory GHSA-ccrj-gw8r-854m (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2026-118259)Record last updated .