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Vulnerability · Published Jun 18, 2026 · Assigned by GitHub_M

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

High 7.1

In plain English

A high-severity authentication bypass by spoofing in woodpecker from woodpecker-ci. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 37% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 4.0)7.1High
Exploit odds (30 days)0.4%top 62.8% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official 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 packages & fixed versions

EcosystemPackageFixed inAdvisory
Gogo.woodpecker-ci.org/woodpeckerno fix listedGO-2026-5976
Gogo.woodpecker-ci.org/woodpecker/v2no fix listedGO-2026-5976
Gogo.woodpecker-ci.org/woodpecker/v33.14.1GHSA-g7mm-9vx7-jm7h
Gogo.woodpecker-ci.org/woodpecker/v33.14.1GO-2026-5976

Affected products (as reported)

VendorProductVersions
woodpecker-ci woodpecker >= 3.0.0, < 3.14.1

Weakness: CWE-290, CWE-639 · Vector: 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

References