CVE-2025-68925: Jervis has a JWT Algorithm Confusion Vulnerability

Severity: medium (CVSS 5.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-01-13 · updated 2026-06-17
Weakness: CWE-347

Description

Jervis is a library for Job DSL plugin scripts and shared Jenkins pipeline libraries. Prior to 2.2, the code doesn't validate that the JWT header specifies "alg":"RS256". This vulnerability is fixed in 2.2.

Affected products

samrocketman jervis: before 2.2 — fixed in 2.2

How to fix

Upgrade to a fixed version: samrocketman jervis 2.2. Check the vendor advisory for mitigations.

References

https://github.com/samrocketman/jervis/commit/c3981ff71de7b0f767dfe7b37a2372cb2a51974a
https://github.com/samrocketman/jervis/security/advisories/GHSA-5pq9-5mpr-jj85

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