SUSE-SU-2026:22138-1: important: Security update for python-PyJWT

[SLE-SECURITY-UPDATES]

# Security update for python-PyJWT

Announcement ID: SUSE-SU-2026:22138-1  
Release Date: 2026-06-16T09:10:04Z  
Rating: important  
References:

  * bsc#1266798
  * bsc#1266799
  * bsc#1266800
  * bsc#1266801
  * bsc#1266802

  
Cross-References:

  * CVE-2026-48522
  * CVE-2026-48523
  * CVE-2026-48524
  * CVE-2026-48525
  * CVE-2026-48526

  
CVSS scores:

  * CVE-2026-48522 ( SUSE ):  6.3
    CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N
  * CVE-2026-48522 ( SUSE ):  4.8 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N
  * CVE-2026-48522 ( NVD ):  4.2 CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N
  * CVE-2026-48523 ( SUSE ):  5.3
    CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N
  * CVE-2026-48523 ( SUSE ):  5.4 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
  * CVE-2026-48523 ( NVD ):  5.4 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
  * CVE-2026-48524 ( SUSE ):  6.3
    CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
  * CVE-2026-48524 ( SUSE ):  3.7 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
  * CVE-2026-48524 ( NVD ):  3.7 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
  * CVE-2026-48525 ( SUSE ):  7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
  * CVE-2026-48525 ( NVD ):  5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
  * CVE-2026-48526 ( 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-2026-48526 ( SUSE ):  7.4 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
  * CVE-2026-48526 ( NVD ):  7.4 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

  
Affected Products:

  * SUSE Linux Micro 6.1

  
  
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).

## 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 Micro 6.1  
    zypper in -t patch SUSE-SLE-Micro-6.1-580=1

## Package List:

  * SUSE Linux Micro 6.1 (noarch)
    * python311-PyJWT-2.12.1-slfo.1.1_2.1

## 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

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