{"id":"CVE-2026-115506","published":"2026-10-22T20:17:06.620","lastModified":"2026-10-23T21:17:22.280","description":"libexpat through 2.9.0 contains a denial of service vulnerability because billion laughs protection in accountingDiffTolerated() in xmlparse.c detects entity amplification too late. Attackers can supply a moderately sized XML document with a large DTD and nested entity expansions to consume tens of seconds of CPU per parse.","cvssScore":7.5,"cvssSeverity":"HIGH","cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","cwes":["CWE-776"],"vendors":[],"products":[],"references":[{"url":"https://github.com/hannob/lololol","tags":[]},{"url":"https://github.com/libexpat/libexpat","tags":[]},{"url":"https://github.com/libexpat/libexpat/issues/1160","tags":[]},{"url":"https://github.com/libexpat/libexpat/pull/1433","tags":[]},{"url":"https://www.vulncheck.com/advisories/libexpat-through-2.9.0-denial-of-service-via-billion-laughs-detection-delay","tags":[]}],"exploitRefs":[{"url":"https://github.com/hannob/lololol","tags":[]},{"url":"https://github.com/libexpat/libexpat","tags":[]},{"url":"https://github.com/libexpat/libexpat/issues/1160","tags":[]},{"url":"https://github.com/libexpat/libexpat/pull/1433","tags":[]}],"hasPoc":true,"ai":null}