CVE-2026-80179

Severity CVSS v4.0:

Pending analysis

Type:

Unavailable / Other

Publication date:

28/08/2026

Last modified:

28/08/2026

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.

Impact

Vector 3.x

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS v3.1 Severity and Metrics:

Base Score: 5.90 MEDIUM
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector (AV): Network
Attack Complexity (AC): High
Privileges Required (PR): None
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): None
Integrity (I): None
Availability (A): High

Base Score 3.x

5.90

Severity 3.x

MEDIUM

References to Advisories, Solutions, and Tools

https://access.redhat.com/security/cve/CVE-2026-80179
https://bugzilla.redhat.com/show_bug.cgi?id=2524147
https://github.com/latchset/jwcrypto/security/advisories/GHSA-96rv-c4vc-h4f4
https://github.com/latchset/jwcrypto/security/advisories/GHSA-96rv-c4vc-h4f4