CVE-2026-50141CWE-290CWE-639

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

High · published June 18, 2026

CVSS v4.0
7.1
EPSS
0%
Percentile
35.9
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v4.0
7.1 · HIGH
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
EPSS
0.00427 · 35.9th percentile
Weaknesses
CWE-290 · Authentication Bypass by Spoofing; CWE-639 · Authorization Bypass Through User-Controlled Key
Published
2026-06-18T14:13Z
EPSS history
Timeline
  • 18 JUN 14:13Z
    Woodpecker gRPC agent_id metadata can be spoofed- cross-tenant agent impersonation
    cvelistv5