SUSE alert openSUSE-SU-2026:21095-1 (python-pyjwt)

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openSUSE-SU-2026:21095-1: important: Security update for python-PyJWT
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Tue, 30 Jun 2026 09:48:19 +0200
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<20260630074819.C6B34FF48@maintenance.suse.de>
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Article
openSUSE security update: security update for python-pyjwt
-------------------------------------------------------------

Announcement ID: openSUSE-SU-2026:21095-1
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 ): 4.8 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N
  * 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-2026-48523 ( 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 ( 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-2026-48524 ( 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 ( 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-2026-48525 ( SUSE ): 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
  * CVE-2026-48526 ( 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 ( 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

Affected Products:

         openSUSE Leap 16.0

-------------------------------------------------------------

An update that solves 5 vulnerabilities and has 5 bug fixes 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 openSUSE security 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 16.0

   zypper in -t patch openSUSE-Leap-16.0-960=1

Package List:

- openSUSE Leap 16.0:

  python313-PyJWT-2.12.1-160000.2.1

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