Bug 2532688 (CVE-2026-90771) - CVE-2026-90771 joi: joi: Prototype Pollution via custom messages
Summary: CVE-2026-90771 joi: joi: Prototype Pollution via custom messages
Keywords:
Status: NEW
Alias: CVE-2026-90771
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On: 2533102 2533103 2533105 2533099 2533100 2533101 2533104
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-09-13 10:51 UTC by OSIDB Bzimport
Modified: 2026-09-14 14:14 UTC (History)
39 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed:
Embargoed:

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Description OSIDB Bzimport 2026-09-13 10:51:40 UTC 
joi before versions 17.13.8 and 18.2.9 contains a prototype pollution vulnerability in the messages compilation function that accepts __proto__ as an error code. Attackers can supply __proto__ keys in custom messages to replace the returned object's prototype, breaking downstream code relying on Object.prototype methods.
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