{"id":"CVE-2026-115351","revision":"e7ec41dfa35e4eab85fbfea108150a95","records":[{"revision":"e7ec41dfa35e4eab85fbfea108150a95","observedAt":"2026-10-29T13:12:12.589+00:00","statement":{"source":"cve-program","id":"CVE-2026-115351","aliases":[],"title":"Mistune 3.2.1 before 3.3.0 CSS Injection via Figure Directive figwidth Option","description":"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.","state":0,"publishedAt":"2026-10-22T19:13:27.678+00:00","modifiedAt":"2026-10-29T11:53:14.49+00:00","affected":[{"ecosystem":"Vendor product","name":"mistune","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"lepture\",\n                    \"product\": \"mistune\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"packageURL\": \"pkg:pypi/mistune\",\n                    \"versions\": [\n                        {\n                            \"version\": \"3.2.1\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\",\n                            \"lessThan\": \"3.3.0\"\n                        },\n                        {\n                            \"version\": \"3.3.0\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N","score":5.3,"severity":"MEDIUM"},{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:N/A:N","score":4.7,"severity":"MEDIUM"}],"references":["https://github.com/lepture/mistune/security/advisories/GHSA-xmwc-wjpr-q378","https://www.vulncheck.com/advisories/mistune-3.2.1-before-3.3.0-css-injection-via-figure-directive-figwidth-option"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-115351","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-115351","identifiers":["CVE-2026-115351"]},"retained":false,"historicalAffected":[]}],"coverage":[]}