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

Quick assessment

Affected
woodpecker-ci woodpecker
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

woodpecker-ci Woodpecker是woodpecker-ci团队开源的一个简单而强大的 CI/CD 引擎。 Woodpecker CI Woodpecker 3.0.0版本至3.14.1之前版本存在安全漏洞，该漏洞源于gRPC层允许认证代理通过注入伪造的agent_id值冒充其他代理。

AI Predicted 8.1 Difficulty: Easy EPSS 0.43% · P36

Possible ATT&CK Techniques 1 AI

T1136.003 · Cloud Account

Affected Version Matrix 1

VendorProduct Version RangeStatus
woodpecker-ci woodpecker >= 3.0.0, < 3.14.1 affected
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I. Basic Information for CVE-2026-50141

Vulnerability Information
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Vulnerability Title
Woodpecker gRPC agent_id metadata can be spoofed- cross-tenant agent impersonation
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
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
Source: CVE Program / CVE List V5
Vulnerability Type
使用欺骗进行的认证绕过
Source: CVE Program / CVE List V5
Vulnerability Title
Woodpecker CI Woodpecker 授权问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
woodpecker-ci Woodpecker是woodpecker-ci团队开源的一个简单而强大的 CI/CD 引擎。 Woodpecker CI Woodpecker 3.0.0版本至3.14.1之前版本存在安全漏洞，该漏洞源于gRPC层允许认证代理通过注入伪造的agent_id值冒充其他代理。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
woodpecker-ci woodpecker >= 3.0.0, < 3.14.1 -

II. Public POCs for CVE-2026-50141

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III. Intelligence Information for CVE-2026-50141

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Patches & Fixes for CVE-2026-50141 (2)

Vendor Advisories for CVE-2026-50141 (1)

Proof of Concept for CVE-2026-50141 (1)

Other References for CVE-2026-50141 (1)

IV. Related Vulnerabilities

Same product: woodpecker
Same vendor: woodpecker-ci
Same weakness: CWE-290

V. Comments for CVE-2026-50141

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