CVE-2026-33996
Published: Mar 27, 2026
Modified: Mar 31, 2026
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.
| Vendor | Product | Versions |
|---|---|---|
benmcollins | libjwt | affected >= 3.0.0, < 3.3.0 |
Weaknesses (CWE)
References
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