CVE-2026-50141
Woodpecker gRPC agent_id metadata can be spoofed- cross-tenant agent impersonation
- State
- Published
- Severity
- 7.1 High
- Published
- Jun 18, 2026
- Updated
- Jun 18, 2026
- Reserved
- Jun 3, 2026
Description
Woodpecker is a CI/CD engine. Starting in version 3.0.0 and prior to version 3.14.1, a vulnerability in Woodpecker CI's gRPC layer allowed any authenticated agent to impersonate any other agent on the same server by injecting a forged `agent_id` value into outgoing gRPC metadata. The server correctly verified the JWT token but then discarded the verified agent identity in favor of the client-supplied value. Version 3.14.1 patches the issue. As a workaround, disable org agents (`WOODPECKER_DISABLE_USER_AGENT_REGISTRATION=true`) and delete existing ones.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 7.1 High | CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N | GitHub_M |
Weaknesses
Affected Products
| Product | Versions |
|---|---|
woodpeckerwoodpecker-ci |
|
References
- https://github.com/woodpecker-ci/woodpecker/security/advisories/GHSA-g7mm-9vx7-jm7h
- https://github.com/woodpecker-ci/woodpecker-security/issues/21
- https://github.com/woodpecker-ci/woodpecker/issues/6541
- https://github.com/woodpecker-ci/woodpecker/pull/6567
- https://github.com/woodpecker-ci/woodpecker/pull/6569
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