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SUSE Python-Authlib Critical Issues Fix Advisory 2026-0975-1

An update that solves three vulnerabilities can now be installed.. # Security update for python-Authlib Announcement ID: SUSE-SU-2026:0975-1 Release Date: 2026-03-23T16:34:44Z Rating: critical References: * bsc#1259736 * bsc#1259737 * bsc#1259738 Cross-References: * CVE-2026-27962 * CVE-2026-28490 * CVE-2026-28498 CVSS scores: * CVE-2026-27962 ( SUSE ): 9.1 CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N * CVE-2026-27962 ( SUSE ): 9.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N * CVE-2026-27962 ( NVD ): 9.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N * CVE-2026-28490 ( SUSE ): 8.2 CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N * CVE-2026-28490 ( SUSE ): 5.9 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N * CVE-2026-28490 ( NVD ): 8.3 CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X * CVE-2026-28490 ( NVD ): 6.5 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N * CVE-2026-28498 ( SUSE ): 9.1 CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N * CVE-2026-28498 ( SUSE ): 9.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N * CVE-2026-28498 ( NVD ): 8.2 CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X * CVE-2026-28498 ( NVD ): 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N 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 An update that solves three vulnerabilities can now be installed. ## Description: This update for python-Authlibfixes 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). ## 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: * 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 . Critical security update for python-Authlib resolves multiple risks. Install SUSE patch to safeguard your systems effectively.. python Authlib security update critical patch SUSE vulnerabilities. . Severity: Critical.LinuxSecurity.com Team

Mar 24, 2026 •Critical SuSE