{"id":"CVE-2026-77643","title":"A cross-site scripting vulnerability in \nqueryparser/termgenerator_internal.cc in Xapian xapian-core before 2.1.0 and before 1.4.32 exists due to incomplete HTML escaping by Xapian::MSet::snippet()","summary":"A cross-site scripting vulnerability in \nqueryparser/termgenerator_internal.cc in Xapian xapian-core before 2.1.0 and before 1.4.32 exists due to incomplete HTML escaping by Xapian::MSet::snippet(). NOTE: this issue exists because of a m…","severity":"medium","cvss":4.4,"cvssVector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:L/I:L/A:N","cwe":["CWE-79"],"published":"2026-08-20","updated":"2026-09-09","sourceUpdated":"2026-09-09T16:04:24.933","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-77643","references":[{"url":"https://bugs.debian.org/1144490","label":"cve@mitre.org"},{"url":"https://lists.xapian.org/pipermail/xapian-devel/2026-August/003429.html","label":"cve@mitre.org"},{"url":"https://trac.xapian.org/wiki/SecurityFixes/2018-07-02#a2026-08-13update","label":"cve@mitre.org"}],"tags":["nvd"],"epss":0.00156,"epssPercentile":0.05202,"ingestedAt":"2026-09-09T16:14:05.514Z","slug":"CVE-2026-77643","body":"## Overview\n\nA cross-site scripting vulnerability in \nqueryparser/termgenerator_internal.cc in Xapian xapian-core before 2.1.0 and before 1.4.32 exists due to incomplete HTML escaping by Xapian::MSet::snippet(). NOTE: this issue exists because of a missed corner case of CVE-2018-0499.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":24,"depthScoreParts":{"impact":24.2,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}