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Fedora 39 Python-JWT Security Vulnerability Mitigation 30780-5

opensuse
Calendar Grey April 30, 2026
Scroller Opensuse Esm H88
Critical update for openSUSE Leap 16.0 addresses security issue in python-jwcrypto to prevent memory exhaustion.
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

Topics%20covered

Topics Covered

security advisory DoS important memory exhaustion OpenSUSE python-jwcrypto

Patch

Package List

- openSUSE Leap 16.0:

python313-jwcrypto-1.5.6-160000.3.1

References

* bsc#1261802

References:

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

Severity
important
Lowest
Low
Medium
High
Critical

Announcement ID: openSUSE-SU-2026:20644-1
Rating: important
Affected Products: openSUSE Leap 16.0 -------------------------------------------------------------

Topics%20covered

Topics Covered

security advisory DoS important memory exhaustion OpenSUSE python-jwcrypto

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