SUSE alert openSUSE-SU-2026:21066-1 (python-python-multipart)

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openSUSE-SU-2026:21066-1: important: Security update for python-python-multipart
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Tue, 30 Jun 2026 09:48:11 +0200
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<20260630074811.61ECFFF48@maintenance.suse.de>
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Article
openSUSE security update: security update for python-python-multipart
-------------------------------------------------------------

Announcement ID: openSUSE-SU-2026:21066-1
Rating: important
References:

  * bsc#1268488
  * bsc#1268496
  * bsc#1268500
  * bsc#1268506



Cross-References:

  * CVE-2026-53537
  * CVE-2026-53538
  * CVE-2026-53539
  * CVE-2026-53540



CVSS scores:

  * CVE-2026-53537 ( SUSE ): 3.7 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N
  * CVE-2026-53537 ( SUSE ): 6.3 CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N
  * CVE-2026-53538 ( SUSE ): 3.7 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N
  * CVE-2026-53538 ( SUSE ): 6.3 CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N
  * CVE-2026-53539 ( SUSE ): 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
  * CVE-2026-53539 ( SUSE ): 8.7 CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
  * CVE-2026-53540 ( SUSE ): 3.7 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
  * CVE-2026-53540 ( SUSE ): 6.3 CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N

Affected Products:

         openSUSE Leap 16.0

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

An update that solves 4 vulnerabilities and has 4 bug fixes can now be installed.

Description:

This update for python-python-multipart fixes the following issues

- CVE-2026-53537: multipart/form-data with extended parameters can lead to file or parameter
smuggling (bsc#1268506).
- CVE-2026-53538: urlencoded requests containing semicolons can lead to form field smuggling
(bsc#1268496).
- CVE-2026-53539: small crafted body can cause a denial of service (bsc#1268500).
- CVE-2026-53540: crafted request buffers can lead to degrading availability (bsc#1268488).


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-16.0-1088=1

Package List:

- openSUSE Leap 16.0:

  python313-python-multipart-0.0.20-160000.5.1

References:

  * https://www.suse.com/security/cve/CVE-2026-53537.html
  * https://www.suse.com/security/cve/CVE-2026-53538.html
  * https://www.suse.com/security/cve/CVE-2026-53539.html
  * https://www.suse.com/security/cve/CVE-2026-53540.html