What’s Vulnerable › Vulnerabilities

CVE-2026-59892: OpenTelemetry JavaScript: Denial of service in `JaegerPropagator` via unhandled exception on a malformed header

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.6% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-07-08 · updated 2026-10-25
• Weakness: CWE-248

Description

OpenTelemetry JavaScript is the OpenTelemetry JavaScript client. Prior to 2.9.0, @opentelemetry/propagator-jaeger decodes incoming uber-trace-id and uberctx-* HTTP header values with decodeURIComponent() without handling decode errors, allowing an unauthenticated remote attacker to send a malformed percent-encoded value that throws an uncaught URIError and terminates a Node.js process using JaegerPropagator as the active propagator. This issue is fixed in version 2.9.0.

Affected products

• open-telemetry opentelemetry-go: before 2.9.0

References

• https://github.com/open-telemetry/opentelemetry-js/commit/b1c196d49d54caae59741cca0a9d57d101d7ea88
• https://github.com/open-telemetry/opentelemetry-js/releases/tag/v2.9.0
• https://github.com/open-telemetry/opentelemetry-js/security/advisories/GHSA-45rx-2jwx-cxfr
• https://github.com/open-telemetry/opentelemetry-js/security/advisories/GHSA-45rx-2jwx-cxfr

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