league/commonmark vulnerabilities

Browse known CVEs and advisories by package and ecosystem. Severity tells you the worst case. What determines real risk is whether the vulnerable code actually runs in your applications.

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CVE-IDSeverityPackage summary
CVE-2026-33347Mediumleague/commonmark: league/commonmark has an embed extension allowed_domains bypassCVE-2026-30838Mediumleague/commonmark: CommonMark has DisallowedRawHtml extension bypass via whitespace in HTML tag namesCVE-2025-46734Mediumleague/commonmark: league/commonmark contains a XSS vulnerability in Attributes extensionGHSA-C2PC-G5QF-RFRFHighleague/commonmark: league/commonmark's quadratic complexity bugs may lead to a denial of serviceCVE-2018-20583Mediumleague/commonmark: PHP League CommonMark vulnerable to Cross-Site Scripting (XSS)CVE-2019-10010Mediumleague/commonmark: Moderate severity vulnerability that affects league/commonmark

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