What’s Vulnerable › Vulnerabilities

CVE-2026-50141: Woodpecker gRPC agent_id metadata can be spoofed- cross-tenant agent impersonation

• Severity: high (CVSS 7.1 v4.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-06-18 · updated 2026-10-25
• Weakness: CWE-290

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.

Affected products

• woodpecker-ci woodpecker: from 3.0.0, < 3.14.1

References

• 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/security/advisories/GHSA-g7mm-9vx7-jm7h

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