EUVD-2026-37897Published

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

Collected exploitation and prediction evidence

CISA KEV is observed exploitation evidence. FIRST EPSS is a dated prediction of exploitation in the next 30 days. Missing scores are unknown. This collector requests predictions only for explicit CVE aliases in the public NuGet archive; Microsoft release views retain their existing prediction scope.

No collected risk observation for these identifiers. This does not establish absence of exploitation or a zero probability.

cve-program · CVE-2026-50141

Published

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 published: 18 Jun 2026 14:13:38 UTC
Source modified: 18 Jun 2026 16:10:41 UTC
Observed here: 23 Oct 2026 15:48:27 UTC
Source terms: CVE Program Terms of Use

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CVSS 4.0 · 7.1 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

euvd · EUVD-2026-37897

Published

EUVD source date text has no stated timezone and is retained without inventing a UTC instant. Related bulletin membership is not an alias, common cause or applicability claim. A missing vector with a zero score is treated as unrated. Complete vendor/product and underlying source evidence remains in the original JSON.

Original publisher date fields

datePublished: Jun 18, 2026, 2:13:38 PM

dateUpdated: Jun 18, 2026, 4:10:41 PM

Source published: Jun 18, 2026, 2:13:38 PM (timezone not stated)
Source modified: Jun 18, 2026, 4:10:41 PM (timezone not stated)
Observed here: 7 Nov 2026 11:32:49 UTC
Source terms: ENISA EUVD · source terms and attribution apply

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EUVD CVSS 4.0 · 7.1 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

nvd · CVE-2026-50141

Published

NVD analysis and CPE criteria are source context, not proof that a package or your environment is affected. Complete affected data, logical configurations and SSVC are retained in the original JSON.

Source analysis status: Deferred

Weakness classifications: CWE-290 · CWE-639

Original publisher date fields

published: 2026-06-18T14:17:29.400

lastModified: 2026-10-25T23:10:00.167

Source published: 18 Jun 2026 14:17:29 UTC
Source modified: 25 Oct 2026 23:10:00 UTC
Observed here: 27 Oct 2026 13:11:58 UTC
Source terms: NIST NVD usage terms; underlying source attribution retained

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CVSS 4.0 · [email protected] · Secondary · 7.1 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

osv · GHSA-g7mm-9vx7-jm7h

Published

### Impact 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. ### Patches Direct patch: https://github.com/woodpecker-ci/woodpecker/pull/6567 Later proper fix: https://github.com/woodpecker-ci/woodpecker/pull/6569 ### Workarounds Disable org agents (`WOODPECKER_DISABLE_USER_AGENT_REGISTRATION=true`) and delete existing ones ### Resources Public ref: https://github.com/woodpecker-ci/woodpecker/issues/6541 Private com: https://github.com/woodpecker-ci/woodpecker-security/issues/21

Source published: 14 Jul 2026 19:00:29 UTC
Source modified: 21 Jul 2026 19:19:07 UTC
Observed here: 24 Oct 2026 13:19:41 UTC
Source terms: GitHub Advisory Database · CC-BY-4.0

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CVSS_V4 · 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

Publisher rating · HIGH

osv · GO-2026-5976

Published

Woodpecker gRPC agent_id metadata can be spoofed- cross-tenant agent impersonation in go.woodpecker-ci.org/woodpecker

Source published: 17 Jul 2026 19:42:05 UTC
Source modified: 21 Jul 2026 19:15:30 UTC
Observed here: 24 Oct 2026 13:19:41 UTC
Source terms: OSV · upstream source license applies

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This view projects the publisher's source fields for reading; the original JSON retains additional fields and CVE enrichment containers. Attribution: osv · OSV · upstream source license applies. Source text is retained; field grouping and change labels are provided by ChangeIntel.