{"id":"CVE-2026-86432","revision":"de565b07a493431f94a7486301256655","records":[{"revision":"de565b07a493431f94a7486301256655","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-86432","aliases":[],"title":"commonmark 2.0.0 before 2.8.4 Denial of Service via XML","description":"commonmark versions from 2.0.0 before 2.8.4 contain a denial of service vulnerability in XmlRenderer that emits depth-proportional indentation for every XML tag. Attackers can provide deeply nested Markdown or AST structures to cause quadratic memory consumption and output amplification, exhausting server resources.","state":0,"publishedAt":"2026-09-07T12:53:51.897+00:00","modifiedAt":"2026-10-08T15:25:53.38+00:00","affected":[{"ecosystem":"Vendor product","name":"commonmark","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"thephpleague\",\n                    \"product\": \"commonmark\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"versions\": [\n                        {\n                            \"version\": \"2.0.0\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\",\n                            \"lessThan\": \"2.8.4\"\n                        },\n                        {\n                            \"version\": \"2.8.4\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        }\n                    ],\n                    \"packageURL\": \"pkg:composer/league/commonmark\"\n                }"}],"metrics":[{"system":"CVSS 4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N","score":6.9,"severity":"MEDIUM"},{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","score":5.3,"severity":"MEDIUM"}],"references":["https://github.com/thephpleague/commonmark/security/advisories/GHSA-mj63-m3rc-8ppr","https://www.vulncheck.com/advisories/commonmark-2.0.0-before-2.8.4-denial-of-service-via-xml"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-86432","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-86432","identifiers":["CVE-2026-86432"]},"retained":false,"historicalAffected":[]}],"coverage":[]}