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openSUSE Python-PyJWT Important SSRF DoS Issues Vuln 2026-2626-1

opensuse
Calendar Grey June 25, 2026
Dist Opensuse Esm H88
Five important vulnerabilities in python-PyJWT on openSUSE require immediate attention to prevent security breaches.
An update that solves five vulnerabilities can now be installed.

Description

This update for python-PyJWT fixes the following issues

* CVE-2026-48522: `PyJWKClient` passes URI arguments directly to

`urllib.request.urlopen()` and allows for SSRF and token forgery

(bsc#1266798).

* CVE-2026-48523: verifier-side algorithm allow-list bypass when

`jwt.decode()` or `jwt.decode_complete()` are called with a PyJWK key

(bsc#1266799).

* CVE-2026-48524: unlimited processing of JWTs with unknown kid values by

`PyJWKClient.get_signing_key()` leads to unbounded JWKS endpoint requests

and DoS (bsc#1266800).

* CVE-2026-48525: unbounded Base64URL decoding of unused payload segment in

`b64=false` detached JWS allows for DoS (bsc#1266801).

* CVE-2026-48526: no validation of use of JSON Web Keys in HMAC algorithm when

decoding JSON Web Tokens allows for forged HS256 tokens (bsc#1266802).

Topics%20covered

Topics Covered

security advisory DoS important OpenSUSE SSRF token forgery

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:

* SUSE Linux Enterprise High Performance Computing ESPOS 15 SP5

zypper in -t patch SUSE-SLE-Product-HPC-15-SP5-ESPOS-2026-2626=1

* SUSE Linux Enterprise Server for SAP Applications 15 SP6

zypper in -t patch SUSE-SLE-Product-SLES_SAP-15-SP6-2026-2626=1

* SUSE Linux Enterprise Server 15 SP6 LTSS

zypper in -t patch SUSE-SLE-Product-SLES-15-SP6-LTSS-2026-2626=1

* SUSE Linux Enterprise Server for SAP Applications 15 SP4

zypper in -t patch SUSE-SLE-Product-SLES_SAP-15-SP4-2026-2626=1

* SUSE Linux Enterprise Server for SAP Applications 15 SP5

zypper in -t patch SUSE-SLE-Product-SLES_SAP-15-SP5-2026-2626=1

* Public Cloud Module 15-SP4

zypper in -t patch SUSE-SLE-Module-Public-Cloud-15-SP4-2026-2626=1

* SUSE Linux Enterprise High Performance Computing LTSS 15 SP4

zypper in -t patch...

Read the Full Advisory

Package List

* SUSE Linux Enterprise Server for SAP Applications 15 SP4 (noarch)

* python311-PyJWT-2.8.0-150400.8.13.1

* SUSE Linux Enterprise High Performance Computing ESPOS 15 SP4 (noarch)

* python311-PyJWT-2.8.0-150400.8.13.1

* SUSE Linux Enterprise High Performance Computing LTSS 15 SP4 (noarch)

* python311-PyJWT-2.8.0-150400.8.13.1

* Public Cloud Module 15-SP4 (noarch)

* python311-PyJWT-2.8.0-150400.8.13.1

* openSUSE Leap 15.4 (noarch)

* python311-PyJWT-2.8.0-150400.8.13.1

* SUSE Linux Enterprise Server for SAP Applications 15 SP5 (noarch)

* python311-PyJWT-2.8.0-150400.8.13.1

* SUSE Linux Enterprise High Performance Computing ESPOS 15 SP5 (noarch)

* python311-PyJWT-2.8.0-150400.8.13.1

* SUSE Linux Enterprise High Performance Computing LTSS 15 SP5 (noarch)

* python311-PyJWT-2.8.0-150400.8.13.1

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

* python311-PyJWT-2.8.0-150400.8.13.1

* SUSE Linux Enterprise Server 15 SP4 LTSS (noarch)

* python311-PyJWT-2.8.0-150400.8.13.1

* Python 3 Module 15-SP7...

Read the Full Advisory

References

* bsc#1266798

* bsc#1266799

* bsc#1266800

* bsc#1266801

* bsc#1266802

## References:

* https://www.suse.com/security/cve/CVE-2026-48522.html

* https://www.suse.com/security/cve/CVE-2026-48523.html

* https://www.suse.com/security/cve/CVE-2026-48524.html

* https://www.suse.com/security/cve/CVE-2026-48525.html

* https://www.suse.com/security/cve/CVE-2026-48526.html

* https://bugzilla.suse.com/show_bug.cgi?id=1266798

* https://bugzilla.suse.com/show_bug.cgi?id=1266799

* https://bugzilla.suse.com/show_bug.cgi?id=1266800

* https://bugzilla.suse.com/show_bug.cgi?id=1266801

* https://bugzilla.suse.com/show_bug.cgi?id=1266802

Severity
important
Lowest
Low
Medium
High
Critical

Announcement ID: SUSE-SU-2026:2626-1
Release Date: 2026-06-25T08:11:35Z
Affected Products: * openSUSE Leap 15.4 * Public Cloud Module 15-SP4 * Python 3 Module 15-SP7 * SUSE Linux Enterprise Desktop 15 SP7 * SUSE Linux Enterprise High Performance Computing 15 SP4 * SUSE Linux Enterprise High Performance Computing 15 SP5 * SUSE Linux Enterprise High Performance Computing ESPOS 15 SP4 * SUSE Linux Enterprise High Performance Computing ESPOS 15 SP5 * SUSE Linux Enterprise High Performance Computing LTSS 15 SP4 * SUSE Linux Enterprise High Performance Computing LTSS 15 SP5 * SUSE Linux Enterprise Server 15 SP4 * SUSE Linux Enterprise Server 15 SP4 LTSS * SUSE Linux Enterprise Server 15 SP5 * SUSE Linux Enterprise Server 15 SP5 LTSS * 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 SP4 * SUSE Linux Enterprise Server for SAP Applications 15 SP5 * SUSE Linux Enterprise Server for SAP Applications 15 SP6 * SUSE Linux Enterprise Server for SAP Applications 15 SP7 * SUSE Manager Proxy 4.3 * SUSE Manager Retail Branch Server 4.3 * SUSE Manager Server 4.3

Topics%20covered

Topics Covered

security advisory DoS important OpenSUSE SSRF token forgery

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