CVE-2026-77643

State: Published
Severity: 4.4 Medium
Published: Aug 20, 2026
Updated: Aug 28, 2026
Reserved: Aug 20, 2026

Description

A cross-site scripting vulnerability in queryparser/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.

Scores

CVSS	Score	Vector	Source
3.1	4.4 Medium	CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:L/I:L/A:N	mitre

Weaknesses

CWE-79 Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting')

Affected Products

Product	Versions
xapian-coreXapian	2.0.0 to before 2.1.0Affected before 1.4.32Affected

References

https://bugs.debian.org/1144490
https://lists.xapian.org/pipermail/xapian-devel/2026-August/003429.html
https://trac.xapian.org/wiki/SecurityFixes/2018-07-02#a2026-08-13update

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