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CVE-2026-118259

opentelemetry-java: Quadratic CPU consumption in W3C tracestate parsing

CVSS score

5.3

EPSS probability

—

Risk score

0.5

Published

2 h ago

OverviewPublic Exploits (0)NewsroomVulnerability Timeline
Patch status has not yet been verified

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Vulnerability description

DayBreach AI Explanation

Verified against sources

opentelemetry-java W3C Tracestate Parsing CPU Consumption Vulnerability

Sources read

1

Source agreement

Tam uyum

Evidence confidence

%55

Short explanation

A vulnerability in opentelemetry-java causes excessive CPU consumption during the parsing of W3C tracestate headers. An unauthenticated attacker can block request or event-loop threads.

Why does it matter?

This security flaw can be exploited over the network without authentication to trigger excessive resource consumption, potentially leading to denial of service conditions.

What should be done?

  • Update to version 1.67.0 or later
  • Follow vendor security advisories
Chain of evidence and sources2 verified claims

opentelemetry-java, 1.67.0 öncesi sürümlerde W3C tracestate başlıklarını ayrıştırırken kuadratik CPU tüketimine tabidir.

S0 · daybreach-canonicalS1 · cvelist

Kimliği doğrulanmamış bir saldırgan, istek veya olay döngüsü iş parçacıklarını tekrar tekrar bloke edebilir.

S0 · daybreach-canonicalS1 · cvelist
Show the technical text from the sources

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.

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

CWE: CWE-1333

This explanation was compiled automatically from the source records. Scores, active exploitation, patch and exploit status come straight from the sources.

IMPACT: Affected Products and Software

Affected Products

The following products are affected by CVE-2026-118259 vulnerability. Where our threat engine knows the exact affected versions, they are listed below.

IDVENDORPRODUCTACTION
1open-telemetryopentelemetry-java View
Total affected vendors: 1|Products: 1

RED HAT CSAF/VEX: Product Impact Check

Red Hat has not yet published a CSAF/VEX impact record for this CVE. This does not mean “not affected”.

SCORING: CVSS from Multiple Sources

CVSS Scores

The Common Vulnerability Scoring System is a standardised framework for assessing the severity of vulnerabilities in software and systems. We collect and display CVSS scores from several sources for each CVE.

SCOREVERSIONSEVERITYVECTORSOURCE
5.3CVSS V31MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:LNVD
5.3CVSS V3_1MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:LCVE CNA

Patch and Remediation Guide

Solution & Remediation Advisory

Patch status unknown

İncelenen resmî kaynaklarda yama durumu doğrulanamadı. Bu sonuç “yama yok” anlamına gelmez.

Confirm the affected product and version against the source evidence above.
Restrict access to internet-facing services and apply network segmentation.
Until a patch is confirmed, follow the vendor advisory; do not read an unknown status as “no patch”.
Monitor server logs and network endpoints for signs of anomalous execution.

Public exploit and active exploitation status

Verified exploit intelligence

No verified public PoC, exploit repository or Metasploit module has been found for this CVE yet.

Weakness Classification and Attack Patterns (CWE & CAPEC)

CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorises the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-118259 is associated with the following CWEs:

CWE-1333: Common Weakness Enumeration Entry CWE-1333

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2026-118259 weaknesses.

CAPEC-66: SQL InjectionCAPEC-126: Path TraversalCAPEC-28: OS Command Injection

Attack Vector and Accessibility

ExposureAğ üzerinden
PermissionsGerekmiyor
UserGerekmiyor

Official Sources and Advisories

https://github.com/open-telemetry/opentelemetry-java/security/advisories/GHSA-ccrj-gw8r-854mvendor-advisoryhttps://github.com/open-telemetry/opentelemetry-java/pull/8914vendor-advisoryhttps://github.com/open-telemetry/opentelemetry-java/commit/ba4dfea91647d1ef596975db5d7197681df3c0f5vendor-advisoryhttps://github.com/open-telemetry/opentelemetry-java/commit/cc4f5f22aed0d69369941cde8029e73507cf438fvendor-advisoryhttps://github.com/open-telemetry/opentelemetry-java/releases/tag/v1.67.0vendor-advisory

CVSS Vector Radar Chart

5.3 / 10
Attack VectorNetworkComplexityLowPrivilegesNoneUser Interact.NoneConfidentialityLowIntegrityNoneAvailabilityLow

Vulnerability Scoring Details

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredNone required
User InteractionNone required
Confidentiality (Gizlilik)Low
Integrity (Bütünlük)None
Availability (Erişilebilirlik)Low

Yama durumu bilinmiyor

İncelenen resmî kaynaklarda yama durumu doğrulanamadı. Bu sonuç “yama yok” anlamına gelmez.

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Weakness Type (CWE & CAPEC)

CWE-1333

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CVE-2026-118259 · opentelemetry-java: Quadratic CPU…