{"id":"CVE-2026-115506","aliases":[],"url":"https://o3.security/vulnerability/CVE-2026-115506","summary":"libexpat through 2.9.0 Denial of Service via Billion Laughs Detection Delay","details":"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.","published":"2026-10-22T19:14:06.001Z","modified":"2026-10-23T10:45:29.883834863Z","cvss":null,"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[],"fix":{"url":"https://github.com/libexpat/libexpat/pull/1433","label":"libexpat/libexpat#1433"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/115xxx/CVE-2026-115506.json"},{"type":"EVIDENCE","url":"https://github.com/hannob/lololol"},{"type":"PACKAGE","url":"https://github.com/libexpat/libexpat"},{"type":"REPORT","url":"https://github.com/libexpat/libexpat/issues/1160"},{"type":"FIX","url":"https://github.com/libexpat/libexpat/pull/1433"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-115506"},{"type":"ADVISORY","url":"https://www.vulncheck.com/advisories/libexpat-through-2.9.0-denial-of-service-via-billion-laughs-detection-delay"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-10-23T10:45:29.883834863Z"}}