CVE-2026-33996

MEDIUM

5.5

Description

LibJWT is a C JSON Web Token Library. Starting in version 3.0.0 and prior to version 3.3.0, the JWK parsing for RSA-PSS did not protect against a NULL value when expecting to parse JSON string values. A specially crafted JWK file could exploit this behavior by using integers in places where the code expected a string. This was fixed in v3.3.0. A workaround is available. Users importing keys through a JWK file should not do so from untrusted sources. Use the `jwk2key` tool to check for validity of a JWK file. Likewise, if possible, do not use JWK files with RSA-PSS keys.

Details CVE

Score CVSS v3.15.5

SeveriteMEDIUM

Vecteur CVSSCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Vecteur d'attaqueLOCAL

ComplexiteLOW

Privileges requisNONE

Interaction utilisateurREQUIRED

Publie3/27/2026

Derniere modification3/31/2026

Sourcenvd

Observations honeypot0

Produits affectes

libjwt:libjwt

Faiblesses (CWE)

CWE-476

References

https://github.com/benmcollins/libjwt/commit/cfd890286fa49ae61b534c937c9f0428b5c6034c(security-advisories@github.com)

https://github.com/benmcollins/libjwt/security/advisories/GHSA-ph96-hqpc-9f66(security-advisories@github.com)

Correlations IOC

Aucune correlation enregistree

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