Is CVE-2026-80179 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-80179?

CVE-2026-80179 has a CVSS v3 severity of MEDIUM (5.9).

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CVE-2026-80179

Description

A flaw was found in jwcrypto. A remote attacker can send a specially crafted JSON Web Encryption (JWE) token containing numerous period delimiters. This malformed token can force the JWE.deserialize() function to allocate excessive memory, leading to a MemoryError. This issue results in a denial of service (DoS) for services that process untrusted JWE values.