CVE-2026-80179

EUVD-2026-67278
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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
5.9 MEDIUM
NETWORK
HIGH
NONE
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Awaiting analysis
This vulnerability is currently awaiting analysis.
Base Score
CVSS 3.x
EPSS Score
Percentile: 16.3%
Debian logo
Debian Releases
Debian Product
Codename
python-jwcrypto
bookworm
vulnerable
bullseye
vulnerable
bullseye (security)
vulnerable
forky
vulnerable
sid
vulnerable
trixie
vulnerable
Common Weakness Enumeration
References
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