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openSUSE 15.6 python-Authlib Critical Threats Bypass Integrity 2026-0975-1

opensuse
Calendar Grey March 24, 2026
Scroller Opensuse
Critical update for openSUSE addressing three significant security threats in python-Authlib with immediate installation recommended.
An update that solves three vulnerabilities can now be installed.

Description

This update for python-Authlib fixes the following issues:

* CVE-2026-27962: JWS `deserialize_compact()` allows for signature bypass by

accepting user-controlled embedded JWK as verification key (bsc#1259738).

* CVE-2026-28490: cryptographic padding oracle in JWE RSA1_5 key management

algorithm (bsc#1259736).

* CVE-2026-28498: fail-open in behavior OIDC hash validation allows for bypass

mandatory integrity protections (bsc#1259737).

Topics%20covered

Topics Covered

security advisory critical bypass OpenSUSE integrity python-Authlib

Patch

## 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:

* openSUSE Leap 15.6

zypper in -t patch SUSE-2026-975=1 openSUSE-SLE-15.6-2026-975=1

* Python 3 Module 15-SP7

zypper in -t patch SUSE-SLE-Module-Python3-15-SP7-2026-975=1

* SUSE Linux Enterprise Server 15 SP6 LTSS

zypper in -t patch SUSE-SLE-Product-SLES-15-SP6-LTSS-2026-975=1

* SUSE Linux Enterprise Server for SAP Applications 15 SP6

zypper in -t patch SUSE-SLE-Product-SLES_SAP-15-SP6-2026-975=1

Package List

* openSUSE Leap 15.6 (noarch)

* python311-Authlib-1.3.1-150600.3.17.1

* Python 3 Module 15-SP7 (noarch)

* python311-Authlib-1.3.1-150600.3.17.1

* SUSE Linux Enterprise Server 15 SP6 LTSS (noarch)

* python311-Authlib-1.3.1-150600.3.17.1

* SUSE Linux Enterprise Server for SAP Applications 15 SP6 (noarch)

* python311-Authlib-1.3.1-150600.3.17.1

References

* bsc#1259736

* bsc#1259737

* bsc#1259738

## References:

* https://www.suse.com/security/cve/CVE-2026-27962.html

* https://www.suse.com/security/cve/CVE-2026-28490.html

* https://www.suse.com/security/cve/CVE-2026-28498.html

* https://bugzilla.suse.com/show_bug.cgi?id=1259736

* https://bugzilla.suse.com/show_bug.cgi?id=1259737

* https://bugzilla.suse.com/show_bug.cgi?id=1259738

Severity
critical
Lowest
Low
Medium
High
Critical

Announcement ID: SUSE-SU-2026:0975-1
Release Date: 2026-03-23T16:34:44Z
Affected Products: * openSUSE Leap 15.6 * Python 3 Module 15-SP7 * SUSE Linux Enterprise Desktop 15 SP7 * SUSE Linux Enterprise Server 15 SP6 * SUSE Linux Enterprise Server 15 SP6 LTSS * SUSE Linux Enterprise Server 15 SP7 * SUSE Linux Enterprise Server for SAP Applications 15 SP6 * SUSE Linux Enterprise Server for SAP Applications 15 SP7

Topics%20covered

Topics Covered

security advisory critical bypass OpenSUSE integrity python-Authlib

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