SUSE-SU-2026:21858-1: important: Security update for python-mistune

Mon Jun 1 20:36:49 UTC 2026

# Security update for python-mistune

Announcement ID: SUSE-SU-2026:21858-1  
Release Date: 2026-05-28T12:08:36Z  
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 ):  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-2026-33079 ( 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 ( NVD ):  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 ):  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-2026-33441 ( SUSE ):  7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
  * CVE-2026-44708 ( 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-2026-44708 ( 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 ( NVD ):  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-2026-44896 ( 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 ( NVD ):  5.3
    CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/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-2026-44896 ( NVD ):  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-2026-44897 ( 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 ( NVD ):  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-2026-44898 ( 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 ( NVD ):  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
  * 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 ( NVD ):  4.7 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:N/A:N
  * CVE-2026-44899 ( NVD ):  6.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Affected Products:

  * SUSE Linux Enterprise Server 16.0
  * SUSE Linux Enterprise Server for SAP applications 16.0

An update that solves seven vulnerabilities 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 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 Server 16.0  
    zypper in -t patch SUSE-SLES-16.0-816=1

  * SUSE Linux Enterprise Server for SAP applications 16.0  
    zypper in -t patch SUSE-SLES-16.0-816=1

## Package List:

  * SUSE Linux Enterprise Server 16.0 (noarch)
    * python313-mistune-3.1.3-160000.3.1
  * SUSE Linux Enterprise Server for SAP applications 16.0 (noarch)
    * 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
  * https://bugzilla.suse.com/show_bug.cgi?id=1264347
  * https://bugzilla.suse.com/show_bug.cgi?id=1264750
  * https://bugzilla.suse.com/show_bug.cgi?id=1264751
  * https://bugzilla.suse.com/show_bug.cgi?id=1264752
  * https://bugzilla.suse.com/show_bug.cgi?id=1264754
  * https://bugzilla.suse.com/show_bug.cgi?id=1265052
  * https://bugzilla.suse.com/show_bug.cgi?id=1265053

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