CVE-2026-77643

EUVD-2026-63667
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.
Cross-site Scripting
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
4.4 MEDIUM
NETWORK
HIGH
LOW
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:L/I:L/A:N
Awaiting analysis
This vulnerability is currently awaiting analysis.
Base Score
CVSS 3.x
EPSS Score
Percentile: 15.19%
Debian logo
Debian Releases
Debian Product
Codename
xapian-core
bookworm
postponed
forky
1.4.32-1
fixed
sid
1.4.32-1
fixed
trixie
1.4.29-3+deb13u1
fixed
Ubuntu logo
Ubuntu Releases
Ubuntu Product
Codename
xapian-core
bionic
needs-triage
focal
needs-triage
jammy
needs-triage
noble
needs-triage
resolute
needs-triage
trusty
needs-triage
xenial
needs-triage
Common Weakness Enumeration
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