high7.1
CVE-2026-50141
Woodpecker gRPC agent_id metadata can be spoofed- cross-tenant agent impersonation
Impact
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.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| go | go.woodpecker-ci.org/woodpecker/v3 | >= 3.0.0, < 3.14.1 | 3.14.1 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/advisories/GHSA-g7mm-9vx7-jm7h
- https://github.com/woodpecker-ci/woodpecker/security/advisories/GHSA-g7mm-9vx7-jm7h
- https://nvd.nist.gov/vuln/detail/CVE-2026-50141
- 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