CVE-2026-80179

Aliases:DEBIAN-CVE-2026-80179UBUNTU-CVE-2026-80179
Advisory lineage Upstream: 0 Downstream: 2
Awaiting Analysis
Published: 27 Aug 2026, 21:14
Last modified:09 Sept 2026, 17:11

Vulnerability Summary

Overall Risk (default)
low
24/100
CVSS Score
5.9 MEDIUM
v3.1 (cve.org)
EPSS Score
0.25% LOW
0% probability 0.00%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

27 Aug 2026, 21:14
Published
Vulnerability first disclosed
09 Sept 2026, 17:11
Last Modified
Vulnerability information updated

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.

CVSS Metrics

  • v3.1•MEDIUM•Score: 5.9CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS Trends

Current EPSS score: 0.25%• Percentile: 17%

Techniques & Countermeasures

  • CWE-770•Allocation of Resources Without Limits or Throttling

    The product allocates a reusable resource or group of resources on behalf of an actor without imposing any intended restrictions on the size or number of resources that can be allocated.

Affected Systems

  • debian•python-jwcrypto

    all | all | all | all

  • ubuntu•python-jwcrypto

    all | all | all | all | all | all

References (6)