Vulnerability · Published Aug 27, 2026 · Assigned by redhat
CVE-2026-80179Jwcrypto: jwcrypto: denial of service via malformed jwe tokens
Medium 5.9
In plain English
A medium-severity resource allocation without limits in Red Hat Ansible Automation Platform 2 from Red Hat. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 23% of all known vulnerabilities).
Official 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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | python-jwcrypto | no fix listed | DEBIAN-CVE-2026-80179 |
| Debian:13 | python-jwcrypto | no fix listed | DEBIAN-CVE-2026-80179 |
| Debian:14 | python-jwcrypto | no fix listed | DEBIAN-CVE-2026-80179 |
| Ubuntu:22.04:LTS | python-jwcrypto | no fix listed | UBUNTU-CVE-2026-80179 |
| Ubuntu:24.04:LTS | python-jwcrypto | no fix listed | UBUNTU-CVE-2026-80179 |
| Ubuntu:26.04:LTS | python-jwcrypto | no fix listed | UBUNTU-CVE-2026-80179 |
| Ubuntu:26.10 | python-jwcrypto | no fix listed | UBUNTU-CVE-2026-80179 |
Affected products (as reported)
Weakness: CWE-770 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
References
- https://access.redhat.com/security/cve/CVE-2026-80179 vdb-entry, x_refsource_REDHAT
- RHBZ#2524147 issue-tracking, x_refsource_REDHAT
- https://github.com/latchset/jwcrypto/security/advisories/GHSA-96rv-c4vc-h4f4