SUSE alert openSUSE-SU-2026:20827-1 (python-mistune)

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openSUSE-SU-2026:20827-1: important: Security update for python-mistune
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Fri, 29 May 2026 17:51:21 +0200
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<20260529155121.4FFD2FD89@maintenance.suse.de>
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Article
openSUSE security update: security update for python-mistune
-------------------------------------------------------------

Announcement ID: openSUSE-SU-2026:20827-1
Rating: important
References:

  * bsc#1264347
  * bsc#1264750
  * bsc#1264751
  * bsc#1264752
  * bsc#1264754
  * bsc#1265052
  * bsc#1265053



Cross-References:

  * CVE-2026-33079
  * CVE-2026-33441
  * CVE-2026-44708
  * CVE-2026-44896
  * CVE-2026-44897
  * CVE-2026-44898
  * CVE-2026-44899



CVSS scores:

  * CVE-2026-33079 ( SUSE ): 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
  * CVE-2026-33079 ( 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/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-2026-33441 ( SUSE ): 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
  * CVE-2026-33441 ( 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-2026-44708 ( SUSE ): 6.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
  * CVE-2026-44708 ( SUSE ): 5.3 CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N
  * CVE-2026-44896 ( SUSE ): 6.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
  * CVE-2026-44896 ( SUSE ): 5.3 CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N
  * CVE-2026-44897 ( SUSE ): 6.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
  * CVE-2026-44897 ( SUSE ): 5.3 CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N
  * CVE-2026-44898 ( SUSE ): 6.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
  * CVE-2026-44898 ( SUSE ): 5.3 CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N
  * CVE-2026-44899 ( SUSE ): 6.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
  * CVE-2026-44899 ( SUSE ): 5.3 CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N

Affected Products:

         openSUSE Leap 16.0

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

An update that solves 7 vulnerabilities and has 7 bug fixes can now be installed.

Description:

This update for python-mistune fixes the following issues

- CVE-2026-33079: ReDoS in `LINK_TITLE_RE` can lead to denial of service via a crafted Markdown
(bsc#1264347).
- CVE-2026-33441: processing of malformed reference links can lead to excessive resource
consumption and denial of
  service (bsc#1264752).
- CVE-2026-44708: improper HTML escaping in the math plugin can lead to XSS (bsc#1264751).
- CVE-2026-44896: improper escaping in `render_figure` can lead to attribute injection and XSS
(bsc#1264754).
- CVE-2026-44897: improper sanitization of user-controlled input in `HTMLRenderer.heading` can lead
to XSS
  (bsc#1264750).
- CVE-2026-44898: improper sanitization of user-supplied HTML input in `render_toc_ul` can lead to
XSS (bsc#1265052).
- CVE-2026-44899: improper input verification in Image directive plugin and improper escaping in
`render_block_image`
  can lead to CSS injection (bsc#1265053).


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-16.0-816=1

Package List:

- openSUSE Leap 16.0:

  python313-mistune-3.1.3-160000.3.1

References:

  * https://www.suse.com/security/cve/CVE-2026-33079.html
  * https://www.suse.com/security/cve/CVE-2026-33441.html
  * https://www.suse.com/security/cve/CVE-2026-44708.html
  * https://www.suse.com/security/cve/CVE-2026-44896.html
  * https://www.suse.com/security/cve/CVE-2026-44897.html
  * https://www.suse.com/security/cve/CVE-2026-44898.html
  * https://www.suse.com/security/cve/CVE-2026-44899.html