CVE-2026-55701: opentelemetry-collector-contrib: githubreceiver silently ignores configured required_headers authentication

June 18, 2026

The githubreceiver webhook handler does not enforce the required_headers configuration. Headers are validated at startup (config rejects empty keys/values) but never checked on incoming requests. This follows the same pattern as GHSA-prf6-xjxh-p698 (awsfirehosereceiver auth bypass). Verified against current main.

References

github.com/advisories/GHSA-w5cv-pw74-4rxc
github.com/open-telemetry/opentelemetry-collector-contrib/security/advisories/GHSA-w5cv-pw74-4rxc
nvd.nist.gov/vuln/detail/CVE-2026-55701

Code Behaviors & Features

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