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CVE-2026-90771

joi before 17.13.8 and 18.2.9 Prototype Pollution via messages PUBLISHED

Description (CNA)

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.

Affected (CNA)

Vendor / productVersions
hapijs / joiaffected 16.0.0 before 17.13.8; affected 18.0.0 before 18.2.9

CWE

CWE-1321

References

ADP enrichment

CISA-ADP

No English description supplied.