SUSE alert openSUSE-SU-2026:20644-1 (python-jwcrypto)

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null@suse.de
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openSUSE-SU-2026:20644-1: important: Security update for python-jwcrypto
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Thu, 30 Apr 2026 15:13:41 +0200
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<20260430131341.C765FFCCC@maintenance.suse.de>
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Article
openSUSE security update: security update for python-jwcrypto
-------------------------------------------------------------

Announcement ID: openSUSE-SU-2026:20644-1
Rating: important
References:

  * bsc#1261802



Cross-References:

  * CVE-2026-39373



CVSS scores:

  * 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 ( 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

Affected Products:

         openSUSE Leap 16.0

-------------------------------------------------------------

An update that solves one vulnerability and has one bug fix can now be installed.

Description:

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 openSUSE security update use the suse recommended installation methods
   like YaST online_update or "zypper patch".
   Alternatively you can run the command listed for your product:

- openSUSE Leap 16.0

   zypper in -t patch openSUSE-Leap-16.0-652=1

Package List:

- openSUSE Leap 16.0:

  python313-jwcrypto-1.5.6-160000.3.1

References:

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