Description
JWCrypto implements JWK, JWS, and JWE specifications using python-cryptography. Prior to 1.5.7, an unauthenticated attacker can exhaust server memory by sending crafted JWE tokens with ZIP compression. The existing patch for CVE-2024-28102 limits input token size to 250KB but does not validate the decompressed output size. An unauthenticated attacker can cause memory exhaustion on memory-constrained systems. A token under the 250KB input limit can decompress to approximately 100MB. This vulnerability is fixed in 1.5.7.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| latchset | jwcrypto | < 1.5.7 | — |
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 | 1.5.6-1.1 | — |
| Debian 13 | python-jwcrypto | 1.5.6-1.1~deb13u1 | — |
| 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 25.10 | python-jwcrypto | No fix yet | — |
| Ubuntu 24.04 LTS | python-jwcrypto | No fix yet | — |
| Ubuntu 22.04 LTS | python-jwcrypto | No fix yet | — |
Show 3 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 20.04 LTS | python-jwcrypto | No fix yet | — |
| 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 | 1.5.6-5.el10_2 | RHSA-2026:19042 |
| RHEL 9 | python-jwcrypto +1 | 1.5.6-3.el9_8 | RHSA-2026:19197 |
Show 3 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat Ansible Automation Platform Inside 2 | receptor | 1.6.4-2.el8ap | RHSA-2026:13512, RHSA-2026:13508 |
| Red Hat Ansible Automation Platform Inside 2 | receptorctl | 1.6.4-2.el9ap | RHSA-2026:13508 |
| Red Hat Ansible Automation Platform Developer 2 | automation-controller | 4.7.11-2.el9ap | RHSA-2026:13508 |
| Red Hat Ansible Automation Platform Developer 2 | automation-controller-cli | 4.6.32-1.el8ap | RHSA-2026:59136, RHSA-2026:59135, RHSA-2026:13508 |
| Red Hat Ansible Automation Platform Developer 2 | python-django +1 | 5.2.17-1.el10ap | RHSA-2026:59136 |
| Red Hat Ansible Automation Platform Developer 2 | python3.12-django | 5.2.17-1.el8ap | RHSA-2026:59136, RHSA-2026:59135 |
| Red Hat Ansible Automation Platform Developer 2 | receptor | 1.6.4-2.el8ap | RHSA-2026:13512, RHSA-2026:13508 |
| Red Hat Ansible Automation Platform Developer 2 | receptorctl | 1.6.4-2.el9ap | RHSA-2026:13508 |
| Red Hat Ansible Automation Platform 2 | automation-controller +2 | 4.7.11-2.el9ap | RHSA-2026:13508 |
| Red Hat Ansible Automation Platform 2 | automation-controller-cli | 4.6.32-1.el8ap | RHSA-2026:59136, RHSA-2026:59135, RHSA-2026:13508 |
| Red Hat Ansible Automation Platform 2 | automation-controller-venv-tower | 4.6.28-3.el8ap | RHSA-2026:59136, RHSA-2026:59135, RHSA-2026:13512 |
| Red Hat Ansible Automation Platform 2 | automation-gateway-proxy +1 | 2.5.10-5.el8ap | RHSA-2026:13512, RHSA-2026:13508 |
| Red Hat Ansible Automation Platform 2 | automation-gateway-server +11 | 2.5.20260422-2.el8ap | RHSA-2026:59135, RHSA-2026:13512, RHSA-2026:13508 |
| Red Hat Ansible Automation Platform 2 | automation-platform-ui | 2.6.8-1.el9ap | RHSA-2026:59136, RHSA-2026:13508 |
| Red Hat Ansible Automation Platform 2 | python-django +1 | 5.2.17-1.el10ap | RHSA-2026:59136 |
| Red Hat Ansible Automation Platform 2 | python3.12-aiohttp | 3.14.3-1.el8ap | RHSA-2026:59136, RHSA-2026:59135 |
| Red Hat Ansible Automation Platform 2 | python3.12-django | 5.2.17-1.el8ap | RHSA-2026:59136, RHSA-2026:59135 |
| Red Hat Ansible Automation Platform 2 | python3.12-django-ansible-base+resource_registry | 2.6.20260422-1.el9ap | RHSA-2026:13508 |
| Red Hat Ansible Automation Platform 2 | python3.12-gitpython | 3.1.59-1.el8ap | RHSA-2026:59136, RHSA-2026:59135 |
| Red Hat Ansible Automation Platform 2 | python3.12-jwcrypto | 1.5.7-1.el8ap | RHSA-2026:13512, RHSA-2026:13508 |
| Red Hat Ansible Automation Platform 2 | python3.12-markdown | 3.10.2-1.el8ap | RHSA-2026:13512, RHSA-2026:13508 |
| Red Hat Ansible Automation Platform 2 | python3.12-pyOpenSSL | 26.0.0-1.el8ap | RHSA-2026:13512, RHSA-2026:13508 |
| Red Hat Ansible Automation Platform 2 | python3.12-pyasn1 | 0.6.3-1.el8ap | RHSA-2026:13512, RHSA-2026:13508 |
| Red Hat Ansible Automation Platform 2 | python3.12-pyjwt +1 | 2.12.1-1.el8ap | RHSA-2026:13512, RHSA-2026:13508 |
| Red Hat Ansible Automation Platform 2 | receptor | 1.6.4-2.el8ap | RHSA-2026:13512, RHSA-2026:13508 |
| Red Hat Ansible Automation Platform 2 | receptorctl | 1.6.4-2.el9ap | RHSA-2026:13508 |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 10 | python3-jwcrypto | 1.5.6-5.el10_2 | ALSA-2026:19042 |
| AlmaLinux 9 | python3-jwcrypto | 1.5.6-3.el9_8 | ALSA-2026:19197 |
Rocky Linux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Rocky Linux 10 | python-jwcrypto | 1.5.6-5.el10_2 | RLSA-2026:19042 |
| Rocky Linux 9 | python-jwcrypto | 1.5.6-3.el9_8 | RLSA-2026:19197 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | python-jwcrypto | 1.5.7-2.1 | openSUSE-SU-2026:10576-1 |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2023 | python3-jwcrypto | 1.4.2-46.amzn2023.0.1 | ALAS2023-2026-1590 |
| Amazon Linux 2 | python-jwcrypto | 0.4.2-1.amzn2.0.3 | ALAS2-2026-3254 |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 3 | python-jwcrypto | No fix yet | — |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 10 | python3-jwcrypto | 1.5.6-5.el10_2 | ELSA-2026-19042 |
| Oracle Linux 9 | python3-jwcrypto | 1.5.6-3.el9_8 | ELSA-2026-19197 |
Wolfi
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Wolfi rolling | py3-jwcrypto +4 | 1.5.7-r0 | — |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| PyPI | jwcrypto | < 1.5.7 | 1.5.7 | GHSA-fjrm-76x2-c4q4 |
Advisories 16
- ALSA-2026:19197 Low: python-jwcrypto security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2026:19042 Low: python-jwcrypto security update AlmaLinux Security Advisories · Oct 29, 2026
- RHSA-2026:59135 Red Hat Security Advisory: Red Hat Ansible Automation Platform 2.5 Product Security and Bug Fix Update Red Hat Security Advisories (RHSA) · Oct 20, 2026
- RHSA-2026:59136 Red Hat Security Advisory: Red Hat Ansible Automation Platform 2.6 Product Security and Bug Fix Update Red Hat Security Advisories (RHSA) · Oct 20, 2026
- RHSA-2026:13512 Red Hat Security Advisory: Red Hat Ansible Automation Platform 2.5 Product Security and Bug Fix Update Red Hat Security Advisories (RHSA) · Oct 20, 2026
- RHSA-2026:13508 Red Hat Security Advisory: Red Hat Ansible Automation Platform 2.6 Product Security and Bug Fix Update Red Hat Security Advisories (RHSA) · Oct 20, 2026
- WID-SEC-2026-1610 Red Hat Enterprise Linux (JWCrypto und python-markdown): Mehrere Schwachstellen ermöglichen Denial of Service BSI CERT-Bund (WID) · Oct 7, 2026
- RHSA-2026:19197 Red Hat Security Advisory: python-jwcrypto security update Red Hat Security Advisories (RHSA) · Sep 15, 2026
- RHSA-2026:19042 Red Hat Security Advisory: python-jwcrypto security update Red Hat Security Advisories (RHSA) · Sep 15, 2026
- ELSA-2026-19042 Low: python-jwcrypto security update (Oracle Linux 10) Oracle Linux Security Advisories (ELSA) · Jul 8, 2026
- ELSA-2026-19197 Low: python-jwcrypto security update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · Jun 12, 2026
- RLSA-2026:19042 Low: python-jwcrypto security update Rocky Linux Security Advisories · May 29, 2026
- RLSA-2026:19197 Low: python-jwcrypto security update Rocky Linux Security Advisories · May 28, 2026
- ALAS2023-2026-1590 Important: python-jwcrypto security update (Amazon Linux 2023) Amazon Linux Security Center (ALAS) · Apr 30, 2026
- ALAS2-2026-3254 Important: python-jwcrypto security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · Apr 29, 2026
- openSUSE-SU-2026:10576-1 python311-jwcrypto-1.5.7-2.1 on GA media SUSE / openSUSE Security Updates · Apr 19, 2026