CVE-2026-115351Medium· 4.7▾ SunlitMistune from 3.2.1 before 3.3.0 contains a CSS injection vulnerability that allows attackers controlling markdown input to inject arbitrary style declarations via the unvalidated figwidth option of the figure directive. Attackers can app…
▾ Sunlit zone — Low / medium · no exploitation signal
impact 25.9 · likelihood 0 · exploitation 0
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Mistune from 3.2.1 before 3.3.0 contains a CSS injection vulnerability that allows attackers controlling markdown input to inject arbitrary style declarations via the unvalidated figwidth option of the figure directive. Attackers can append declarations like background:url() to the rendered figure style attribute, forcing victim browsers to send requests to attacker servers and leak attribute values.
mistune >= 3.2.1 < 3.3.0Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Connected by shared product, vendor, weakness, or advisory.
CVE-2026-115355High· 7.5Mistune before 3.3.0 Path Traversal and XSS via Include Directive
CVE-2026-115353High· 8.6Mistune before 3.3.0 Path Traversal via include Directive
CVE-2026-115352High· 7.5Mistune before 3.3.0 Quadratic-Time DoS via Unmatched Brackets in Inline Parser
CVE-2026-115354Medium· 6.5Mistune before 3.3.0 Arbitrary Local File Read via Include Directive
CVE-2026-115348High· 7.5Mistune before 3.3.0 Quadratic-Time DoS via parse_link_text
CVE-2026-115347High· 7.5Mistune before 3.3.0 Quadratic Denial of Service via parse_link_text