GHSA-g7mm-9vx7-jm7h
Woodpecker gRPC agent_id metadata can be spoofed- cross-tenant agent impersonation
Packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| Go | go.woodpecker-ci.org/woodpecker/v3 | >= 3.0.0, < 3.14.1 | 3.14.1 |
Details
As written in the advisory (Markdown source, shown as plain text).
### Impact
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.
### Patches
Direct patch: https://github.com/woodpecker-ci/woodpecker/pull/6567
Later proper fix: https://github.com/woodpecker-ci/woodpecker/pull/6569
### Workarounds
Disable org agents (`WOODPECKER_DISABLE_USER_AGENT_REGISTRATION=true`) and delete existing ones
### Resources
Public ref: https://github.com/woodpecker-ci/woodpecker/issues/6541
Private com: https://github.com/woodpecker-ci/woodpecker-security/issues/21
References
External links from the advisory. They lead to third-party sites.
- 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
- https://github.com/woodpecker-ci/woodpecker