This page tracks the Debian fix status. The vulnerability itself is described on the main CVE page. View CVE-2026-59928 →

DEBIAN-CVE-2026-59928

Mistune is a Python Markdown parser with renderers and plugins. Prior to 3.3.0, a Markdown document containing many repeated or distinct reference-lin...

Original description

The description as published by the source.

Mistune is a Python Markdown parser with renderers and plugins. Prior to 3.3.0, a Markdown document containing many repeated or distinct reference-link definitions causes quadratic work in src/mistune/block_parser.py and the ref_links environment dictionary handling, allowing denial of service through CPU exhaustion. This issue is fixed in version 3.3.0.

Source: OSV.dev (Open Source Vulnerabilities) OSV

Affected packages

Debian:13 mistune

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Debian:14 mistune

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

References

advisory security-tracker.debian.org