Bug 2567736 (CVE-2026-122131) - CVE-2026-122131 joi: joi: Prototype pollution via untrusted message configuration
Summary: CVE-2026-122131 joi: joi: Prototype pollution via untrusted message configura...
Keywords:
Status: NEW
Alias: CVE-2026-122131
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
low
low
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-11-05 22:22 UTC by OSIDB Bzimport
Modified: 2026-11-06 00:54 UTC (History)
0 users

Fixed In Version:
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Description OSIDB Bzimport 2026-11-05 22:22:06 UTC 
Joi 17.13.6 before 17.13.9 and 18.2.5 before 18.3.1 contains a prototype pollution vulnerability in lib/messages.js compile() and merge() that fails to reject a __proto__ language key. Attackers supplying untrusted message configuration via any().messages(), prefs, validate options or Joi.extend can replace the compiled messages prototype, altering or breaking validation error rendering and dependent logic.
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