openSUSE 15.6 python-Authlib Critical Threats Bypass Integrity 2026-0975-1
opensuse
March 24, 2026
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 Covered
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
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Severity
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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 Covered
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