CVE-2026-55701
OpenTelemetry githubreceiver silently ignores configured required_headers authentication
- Published
- Updated
- Reserved
- Assigned by
- GitHub_M
Description
The OpenTelemetry Collector Contrib repository contains components for the OpenTelemetry Collector. Prior to 0.151.0, the githubreceiver validates the receiver/githubreceiver/config.go RequiredHeaders configuration at startup, but receiver/githubreceiver/trace_receiver.go handleReq() does not check those headers on incoming webhook requests. An unauthenticated sender can therefore bypass an operator's required_headers authentication control and submit arbitrary webhook payloads. When the Secret field is empty, github.ValidatePayload also skips HMAC validation, leaving the webhook endpoint without either configured authentication mechanism. Successful exploitation can inject fabricated CI/CD trace data into the observability pipeline. This issue is fixed in version 0.151.0.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| GitHub_MCNA (assigner) | 4.0 | Medium6.9 | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N |
| NVDNVD · Awaiting Analysis | 4.0 | Medium6.9 | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X |
- EPSS (exploitation in 30 days)
- 0.70% · top 47% of all CVEs (6 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: yes · Technical impact: total
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 6.9.
Weakness
Affected products
open-telemetry · opentelemetry-collector-contrib
- affected < 0.151.0
open-telemetry · github.com/open-telemetry/opentelemetry-collector-contrib/receiver/githubreceiver
- affected < 0.151.0
Affected packages
From reviewed advisories of the GitHub Advisory Database.
- Gogithub.com/open-telemetry/opentelemetry-collector-contrib/receiver/githubreceiverGHSA-w5cv-pw74-4rxc (opens in a new tab)
References (4)
- https://github.com/open-telemetry/opentelemetry-collector-contrib/security/advisories/GHSA-w5cv-pw74-4rxc (opens in a new tab)x_refsource_CONFIRM
- https://github.com/open-telemetry/opentelemetry-collector-contrib/pull/47854 (opens in a new tab)x_refsource_MISC
- https://github.com/open-telemetry/opentelemetry-collector-contrib/commit/54143ccd14f5ebd74ca741739d2099c7fbebbd98 (opens in a new tab)x_refsource_MISC
- https://github.com/open-telemetry/opentelemetry-collector-contrib/releases/tag/v0.151.0 (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-w5cv-pw74-4rxc (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-2026-55701)Record last updated .