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 products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Red Hat | Red Hat Enterprise Linux 10 | — | — |
| Red Hat | Red Hat Ansible Automation Platform 2 | — | — |
| Red Hat | Red Hat Enterprise Linux 9 | — | — |
| Red Hat | Red Hat OpenShift AI (RHOAI) | — | — |
| Red Hat | Red Hat OpenStack Platform 16.2 | — | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | python-jwcrypto | No fix yet | — |
| Debian 13 | python-jwcrypto | No fix yet | — |
| Debian 12 | python-jwcrypto | No fix yet | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | python-jwcrypto | No fix yet | — |
| Ubuntu 26.04 LTS | python-jwcrypto | No fix yet | — |
| Ubuntu 24.04 LTS | python-jwcrypto | No fix yet | — |
| Ubuntu 22.04 LTS | python-jwcrypto | No fix yet | — |
| Ubuntu 20.04 LTS | python-jwcrypto | No fix yet | — |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 18.04 LTS | python-jwcrypto | No fix yet | — |
| Ubuntu 16.04 LTS | python-jwcrypto | No fix yet | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 10 | python-jwcrypto +1 | 1.6.1-1.el10_3 | RHSA-2026:98061 |
Rocky Linux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Rocky Linux 10 | python3-jwcrypto | 1.6.1-1.el10_3 | RLSA-2026:98061 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 16.0 | python-jwcrypto | 1.5.6-160000.4.1 | SUSE-SU-2026:23722-1, SUSE-SU-2026:23702-1 |
| SLES 16.0 | python-jwcrypto | 1.5.6-160000.4.1 | SUSE-SU-2026:23722-1, SUSE-SU-2026:23702-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | python-jwcrypto | 1.6.0-1.1 | openSUSE-SU-2026:11712-1 |
| openSUSE Leap 16.0 | python-jwcrypto | 1.5.6-160000.4.1 | openSUSE-SU-2026:21827-1 |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 3 | python-jwcrypto | No fix yet | — |
Advisories 6
- RHSA-2026:98061 Red Hat Security Advisory: python-jwcrypto security update Red Hat Security Advisories (RHSA) · Nov 13, 2026
- RLSA-2026:98061 Moderate: python-jwcrypto security update Rocky Linux Security Advisories · Nov 13, 2026
- SUSE-SU-2026:23722-1 Security update for python-jwcrypto SUSE / openSUSE Security Updates · Sep 29, 2026
- SUSE-SU-2026:23702-1 Security update for python-jwcrypto SUSE / openSUSE Security Updates · Sep 29, 2026
- openSUSE-SU-2026:21827-1 Security update for python-jwcrypto SUSE / openSUSE Security Updates · Sep 12, 2026
- openSUSE-SU-2026:11712-1 python313-jwcrypto-1.6.0-1.1 on GA media SUSE / openSUSE Security Updates · Sep 8, 2026
References
- RHSA-2026:98061 vendor-advisory
- https://access.redhat.com/security/cve/CVE-2026-80179 vdb-entry
- RHBZ#2524147 issue-tracking
- https://github.com/latchset/jwcrypto/security/advisories/GHSA-96rv-c4vc-h4f4