{
  "affected": [
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 0.150.0"
      },
      "package": {
        "ecosystem": "Go",
        "name": "github.com/open-telemetry/opentelemetry-collector-contrib/receiver/githubreceiver"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.151.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-55701"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-863"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-06-18T15:05:14Z",
    "nvd_published_at": null,
    "severity": "MODERATE"
  },
  "details": "## githubreceiver Silently Ignores Configured required_headers Authentication\n\n### Summary\n\nThe 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](https://github.com/open-telemetry/opentelemetry-collector-contrib/security/advisories/GHSA-prf6-xjxh-p698) (awsfirehosereceiver auth bypass). Verified against current main.\n\n### Details\n\nIn `receiver/githubreceiver/config.go`, the `RequiredHeaders` field is defined (line 45) and validated at startup (lines 93-101). But `receiver/githubreceiver/trace_receiver.go` in `handleReq()` (lines 131-185) never references `RequiredHeaders`.\n\nThe gitlabreceiver enforces the same config correctly at `receiver/gitlabreceiver/traces_receiver.go:266-270`:\n\n    for key, value := range gtr.cfg.WebHook.RequiredHeaders {\n        if r.Header.Get(key) != string(value) {\n            return \"\", fmt.Errorf(\"%w: %s\", errInvalidHeader, key)\n        }\n    }\n\n### Amplifying factor\n\nThe `Secret` field defaults to empty and has no validation requiring it to be set. With an empty secret, `github.ValidatePayload` skips HMAC validation entirely. An operator who configures `required_headers` as their authentication mechanism (without setting `secret`) has zero authentication on the webhook endpoint.\n\n### Impact\n\nAn attacker can send arbitrary webhook payloads to the githubreceiver endpoint, bypassing the operator configured authentication. This allows injecting fake CI/CD trace data into the observability pipeline.\n\n### Suggested Fix\n\nAdd RequiredHeaders enforcement to `handleReq()`, matching the gitlabreceiver pattern.",
  "id": "GHSA-w5cv-pw74-4rxc",
  "modified": "2026-06-18T15:05:14Z",
  "published": "2026-06-18T15:05:14Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/open-telemetry/opentelemetry-collector-contrib/security/advisories/GHSA-w5cv-pw74-4rxc"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/open-telemetry/opentelemetry-collector-contrib"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "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",
      "type": "CVSS_V4"
    }
  ],
  "summary": "opentelemetry-collector-contrib: githubreceiver silently ignores configured required_headers authentication"
}