This page tracks the Debian fix status. The vulnerability itself is described on the main CVE page. View CVE-2026-105829 →

DEBIAN-CVE-2026-105829

League CommonMark from 1.3.0 before 2.10.2 contains a cross-site scripting vulnerability that allows users posting Markdown to bypass the DisallowedRa...

Original description

The description as published by the source.

League CommonMark from 1.3.0 before 2.10.2 contains a cross-site scripting vulnerability that allows users posting Markdown to bypass the DisallowedRawHtml extension by ending raw HTML with a bare disallowed tag name. Attackers can place a lone <script or <iframe line followed by a block supplying attributes like src or onload, executing stored scripts in viewers' browsers under default GFM settings.

Source: OSV.dev (Open Source Vulnerabilities) OSV

Affected packages

Debian:12 php-league-commonmark

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

Debian:13 php-league-commonmark

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

Debian:14 php-league-commonmark

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.10.3-1"}]}]

References

advisory security-tracker.debian.org