Is CVE-2026-33996 actively exploited?

No active exploitation of CVE-2026-33996 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-33996 be exploited remotely?

No. CVE-2026-33996 requires local access to exploit.

What is the CVSS score of CVE-2026-33996?

CVE-2026-33996 has a CVSS score of 5.5 (MEDIUM).

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MEDIUM

CVE-2026-33996

CWE-476Published: March 27, 2026· Updated: Mar 31, 2026

5.5

CVSS v3.1

EPSS:0.02%probability of exploitation in 30 daysPercentile:6.0th

Official 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.

NVD Source

Technical Analysis

CVE-2026-33996 requires local access, meaning attackers must already have a foothold on the target system.

Exploitation does not require any privileges, though user interaction (Required) is needed, which slightly reduces the risk of mass automated attacks.

A successful exploit results in availability disruption (denial of service), with a CVSS base score of 5.5.