CVE-2026-50141

HIGH

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

Title source: cna
STIX 2.1

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.

References (5)

Core 5

Scores

CVSS v4 7.1
EPSS 0.0025
EPSS Percentile 15.7%
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact partial

Details

CWE
CWE-290 CWE-639
Status published
Products (1)
woodpecker-ci/woodpecker >= 3.0.0, < 3.14.1
Published Jun 18, 2026
Tracked Since Jun 18, 2026