CLSA-2026-1788257350 TuxCare security update for league/commonmark (4 CVEs)

TuxCare rebuilt league/commonmark to address 4 CVEs. Fixed in 1.6.7-p4+tuxcare...

PT-2026-89983

TuxCare rebuilt league/commonmark to address 6 CVEs. Fixed in 2.8.2-p2+tuxcare...

PT-2026-89982

TuxCare rebuilt league/commonmark to address 4 CVEs. Fixed in 1.6.7-p4+tuxcare...

PT-2026-86795

Name of the Vulnerable Software and Affected Versions league/commonmark versions 1.5.0 through 2.9.0 Description The SmartPunctExtension and AttributesExtension contain quadratic parsing complexity. An unauthenticated attacker can submit specially crafted Markdown documents to trigger...

PT-2026-89984

TuxCare rebuilt league/commonmark to address 6 CVEs. Fixed in 2.7.1-p2+tuxcare...

EUVD-2026-42992

Snipe-IT vulnerable to stored XSS via Markdown custom field...

GHSA-R52F-R9V5-66XR Snipe-IT vulnerable to stored XSS via Markdown custom field

Impact CommonMark is configured with htmlinput = 'escape', which blocks raw HTML injection. However, javascript: URIs in Markdown hyperlinks are not sanitized. A user with assets.edit permission can inject a malicious link into any markdown-textarea custom field. Any user who opens the asset deta...

CVE-2026-5389

justhtml versions before 1.13.0 contain a cross-site scripting vulnerability in the tomarkdown function when serializing attacker-controlled pre content. Attackers can place backticks inside sanitized pre elements to break out of fixed-length code fences, allowing raw HTML to execute when the...

Linux Distros Unpatched Vulnerability : CVE-2026-71478

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - league/commonmark is a PHP library for parsing and rendering CommonMark Markdown. From 1.5.0 until 2.9.0, the AttributesExtension's href and src unsafe-link...

Linux Distros Unpatched Vulnerability : CVE-2026-71488

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - league/commonmark is a PHP library for parsing and rendering CommonMark Markdown. From 0.6.0 until 2.9.0, specially crafted Markdown lines can cause the parser ...

DEBIAN-CVE-2026-71478

league/commonmark is a PHP library for parsing and rendering CommonMark Markdown. From 1.5.0 until 2.9.0, the AttributesExtension's href and src unsafe-link filter can be bypassed by embedding control bytes, such as a tab, carriage return, line feed, or leading C0 control character, in a...

CVE-2026-71478

league/commonmark is a PHP library for parsing and rendering CommonMark Markdown. From 1.5.0 until 2.9.0, the AttributesExtension's href and src unsafe-link filter can be bypassed by embedding control bytes, such as a tab, carriage return, line feed, or leading C0 control character, in a...

DEBIAN-CVE-2026-71488

league/commonmark is a PHP library for parsing and rendering CommonMark Markdown. From 0.6.0 until 2.9.0, specially crafted Markdown lines can cause the parser to have quadratic time complexity when converting, because several parsing paths repeatedly rescan growing portions of a line to translat...

CVE-2026-71478

league/commonmark is a PHP library for parsing and rendering CommonMark Markdown. From 1.5.0 until 2.9.0, the AttributesExtension's href and src unsafe-link filter can be bypassed by embedding control bytes, such as a tab, carriage return, line feed, or leading C0 control character, in a...

UBUNTU-CVE-2026-71478

league/commonmark is a PHP library for parsing and rendering CommonMark Markdown. From 1.5.0 until 2.9.0, the AttributesExtension's href and src unsafe-link filter can be bypassed by embedding control bytes, such as a tab, carriage return, line feed, or leading C0 control character, in a...

UBUNTU-CVE-2026-71488

league/commonmark is a PHP library for parsing and rendering CommonMark Markdown. From 0.6.0 until 2.9.0, specially crafted Markdown lines can cause the parser to have quadratic time complexity when converting, because several parsing paths repeatedly rescan growing portions of a line to translat...

CVE-2026-71488

league/commonmark is a PHP library for parsing and rendering CommonMark Markdown. From 0.6.0 until 2.9.0, specially crafted Markdown lines can cause the parser to have quadratic time complexity when converting, because several parsing paths repeatedly rescan growing portions of a line to translat...

Asymmetric Resource Consumption (Amplification)

Overview league/commonmark is a PHP-based Markdown parser which supports the full CommonMark spec. It is based on the CommonMark JS reference implementation. Affected versions of this package are vulnerable to Asymmetric Resource Consumption Amplification via the XmlRenderer process. An attacker...

Inefficient Algorithmic Complexity

Overview league/commonmark is a PHP-based Markdown parser which supports the full CommonMark spec. It is based on the CommonMark JS reference implementation. Affected versions of this package are vulnerable to Inefficient Algorithmic Complexity in the UniqueSlugNormalizer::normalize process. An...

Inefficient Algorithmic Complexity

Overview league/commonmark is a PHP-based Markdown parser which supports the full CommonMark spec. It is based on the CommonMark JS reference implementation. Affected versions of this package are vulnerable to Inefficient Algorithmic Complexity via the FootnoteExtension process. An attacker can...