GHSA-JFM3-95JQ-Q3RF league/commonmark: Denial of service via duplicate footnote definitions

Impact The Footnote extension records one backref per footnote reference and then appends the entire backref list for every footnote definition block in the document, without ever de-duplicating or removing repeated definitions of the same label GatherFootnotesListener, populated by...

league/commonmark: Denial of service via adjacent inline attribute blocks

Impact With the Attributes extension enabled, AttributesListener::findTargetAndDirection resolves each attribute node's target by walking outward through its siblings. For a run of N adjacent inline attribute blocks placed at the start of a block with nothing to their left, each node scans the...

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 due to inefficient processing in the...

GHSA-2Q4P-G7HV-5RGV league/commonmark: Quadratic-time denial of service when parsing crafted Markdown

Impact Affected versions of league/commonmark can have quadratic time complexity when parsing specially crafted Markdown lines. In practical terms, doubling the length of an affected line can make the parser perform roughly four times as much work. The parser identifies locations using character...

CVE-2026-71488 league/commonmark: Quadratic-time denial of service when parsing crafted Markdown

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...

CVE-2026-71488 league/commonmark: Quadratic-time denial of service when parsing crafted Markdown

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

The CVE concerns league/commonmark (PHP) with a vulnerability in versions 0.6.0–2.9.0 where crafted Markdown can trigger quadratic-time processing during parsing/conversion. The root cause involves repeatedly rescanning growing segments to translate character positions to byte positions, and the ...

CVE-2026-71488 league/commonmark: Quadratic-time denial of service when parsing crafted Markdown

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...

CVE-2026-19165

Use after free in Extensions in Google Chrome prior to 151.0.7922.109 allowed an attacker who convinced a user to install a malicious extension to execute arbitrary code inside a sandbox via a crafted Chrome Extension. Chromium security severity: High...

CVE-2026-19165

Use after free in Extensions in Google Chrome prior to 151.0.7922.109 allowed an attacker who convinced a user to install a malicious extension to execute arbitrary code inside a sandbox via a crafted Chrome Extension. Chromium security severity: High...

CVE-2026-19165

A use after free vulnerability in the Extensions component of Google Chrome and Microsoft Edge (based on Chromium) allows an attacker to execute arbitrary code within the browser's sandbox. The flaw occurs when the browser uses memory after it has been freed. Exploitation requires a user to be co...

CVE-2026-19165

Use after free in Extensions in Google Chrome prior to 151.0.7922.109 allowed an attacker who convinced a user to install a malicious extension to execute arbitrary code inside a sandbox via a crafted Chrome Extension. Chromium security severity: High...

CVE-2026-19156

Heap buffer overflow in Base in Google Chrome prior to 151.0.7922.109 allowed an attacker who convinced a user to install a malicious extension to potentially exploit heap corruption via a crafted Chrome Extension. Chromium security severity: High...

CVE-2026-19156

A heap buffer overflow vulnerability exists in the Base component of Google Chrome and Microsoft Edge (specifically in Chromium ) prior to version 151.0.7922.109 . An attacker who successfully convinces a user to install a malicious extension can exploit heap corruption via a crafted Chrome Exten...

CVE-2026-19156

Heap buffer overflow in Base in Google Chrome prior to 151.0.7922.109 allowed an attacker who convinced a user to install a malicious extension to potentially exploit heap corruption via a crafted Chrome Extension. Chromium security severity: High...

CVE-2026-19156

Heap buffer overflow in Base in Google Chrome prior to 151.0.7922.109 allowed an attacker who convinced a user to install a malicious extension to potentially exploit heap corruption via a crafted Chrome Extension. Chromium security severity: High...

league/commonmark: AttributesExtension href/src unsafe-link filter bypass via embedded control bytes

Summary The AttributesExtension's href/src unsafe-link filter AttributesHelper::filterAttributes can be bypassed by embedding control bytes in a javascript: URL that browsers discard before parsing the scheme. Two variants: - Tab/newline inside the scheme — a literal ASCII TAB 0x09, CR 0x0D, or...

GHSA-29PJ-957V-52MC league/commonmark: AttributesExtension href/src unsafe-link filter bypass via embedded control bytes

Summary The AttributesExtension's href/src unsafe-link filter AttributesHelper::filterAttributes can be bypassed by embedding control bytes in a javascript: URL that browsers discard before parsing the scheme. Two variants: - Tab/newline inside the scheme — a literal ASCII TAB 0x09, CR 0x0D, or...