CVE-2026-44708
Description
Mistune is a Python Markdown parser with renderers and plugins. Prior to 3.2.1, the mistune math plugin renders inline math ($...$) and block math ($$...$$) by concatenating the raw user-supplied content directly into the HTML output without any HTML escaping. This occurs even when the parser is explicitly created with escape=True, which is supposed to guarantee that all user-controlled text is sanitised before reaching the DOM. This vulnerability is fixed in 3.2.1.
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
Mitigation details
CVE-2026-44708 NameCVE-2026-44708 DescriptionMistune is a Python Markdown parser with renderers and plugins. Prior to 3.2.1, the mistune math plugin renders inline math ($...$) and block math ($$...$$) by concatenating the raw user-supplied content directly into the HTML output without any HTML escaping. This occurs even when the parser is explicitly created with escape=True, which is supposed to…
CVE-2026-44708
| Name | CVE-2026-44708 |
| Description | Mistune is a Python Markdown parser with renderers and plugins. Prior to 3.2.1, the mistune math plugin renders inline math ($...$) and block math ($$...$$) by concatenating the raw user-supplied content directly into the HTML output without any HTML escaping. This occurs even when the parser is explicitly created with escape=True, which is supposed to guarantee that all user-controlled text is sanitised before reaching the DOM. This vulnerability is fixed in 3.2.1. |
| Source | CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| Debian Bugs | 1138260 |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|---|---|---|
| mistune (PTS) | bullseye | 0.8.4-4 | vulnerable |
| bookworm | 2.0.4-1 | vulnerable | |
| trixie | 3.1.3-1 | vulnerable | |
| forky, sid | 3.1.4-1 | vulnerable |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|---|---|---|---|---|---|
| mistune | source | (unstable) | (unfixed) | 1138260 |
Notes
[trixie] - mistune <no-dsa> (Minor issue)
[bookworm] - mistune <no-dsa> (Minor issue)
https://github.com/lepture/mistune/security/advisories/GHSA-8g87-j6q8-g93x
Apply commands
[trixie] - mistune <no-dsa> (Minor issue)[bookworm] - mistune <no-dsa> (Minor issue)https://github.com/lepture/mistune/security/advisories/GHSA-8g87-j6q8-g93xOS impact
Debian Affected 5 releases
| Version | Status | Fixed in |
|---|---|---|
| trixie | Affected | — |
| sid | Affected | — |
| forky | Affected | — |
| bullseye | Affected | — |
| bookworm | Affected | — |
SUSE Affected 1 release
| Version | Status | Fixed in |
|---|---|---|
| — | Affected | — |
Windows Affected 1 release
| Version | Status | Fixed in |
|---|---|---|
| — | Affected | — |
Application impact
| Vendor | Product | Versions | Fixed |
|---|---|---|---|
| mistune_project | mistune | {"endExcluding":"3.2.1"} | 3.2.1 |
References
- https://github.com/lepture/mistune/security/advisories/GHSA-8g87-j6q8-g93x
- https://github.com/lepture/mistune/releases/tag/v3.2.1
- https://github.com/lepture/mistune
- https://www.suse.com/security/cve/CVE-2026-44708.html
- https://github.com/advisories/GHSA-8g87-j6q8-g93x
- https://security-tracker.debian.org/tracker/CVE-2026-44708
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-44708
CWEs
CWE-79
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.