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SUSE python-jwcrypto Important Security Update CVE-2026-39373 2026-21425-1

suse
Calendar Grey May 4, 2026
Dist Suse Esm H88
Discover the important security update for python-jwcrypto addressing memory exhaustion risks in SUSE.
An update that solves one vulnerability can now be installed.

Summary

## This update for python-jwcrypto fixes the following issues: * CVE-2026-39373: weak mitigation for JWT bomb attack in the `deserialize` function can lead to memory exhaustion via crafted compressed JWE tokens (bsc#1261802). ## Patch Instructions: To install this SUSE update use the SUSE recommended installation methods like YaST online_update or "zypper patch". Alternatively you can run the command listed for your product: * SUSE Linux Enterprise Server for SAP applications 16.0 zypper in -t patch SUSE-SLES-16.0-652=1 * SUSE Linux Enterprise Server 16.0 zypper in -t patch SUSE-SLES-16.0-652=1 ## Package List: * SUSE Linux Enterprise Server for SAP applications 16.0 (noarch) * python313-jwcrypto-1.5.6-160000.3.1 * SUSE Linux Enterprise Server 16.0 (noarch) * python313-jwcrypto-1.5.6-160000.3.1

Topics%20covered

Topics Covered

security advisory SuSE important memory exhaustion python-jwcrypto jwt bomb attack

References

* bsc#1261802

Cross-

* CVE-2026-39373

CVSS scores:

* CVE-2026-39373 ( SUSE ): 8.7

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

* CVE-2026-39373 ( SUSE ): 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

* CVE-2026-39373 ( NVD ): 5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Affected Products:

* SUSE Linux Enterprise Server 16.0

* SUSE Linux Enterprise Server for SAP applications 16.0

An update that solves one vulnerability can now be installed.

##

* https://www.suse.com/security/cve/CVE-2026-39373.html

* https://bugzilla.suse.com/show_bug.cgi?id=1261802

Severity
important
Lowest
Low
Medium
High
Critical

Announcement ID: SUSE-SU-2026:21425-1
Release Date: 2026-04-29T08:15:26Z
Rating: important

Topics%20covered

Topics Covered

security advisory SuSE important memory exhaustion python-jwcrypto jwt bomb attack

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