Vulnerability DatabaseCVE-2026-77643
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CVE-2026-77643
Published:August 20, 2026
Updated:September 24, 2026
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.
Affected Packages
https://github.com/xapian/xapian.git (GITHUB):
Affected version(s) >=v1.4.0 <v1.4.32
Fix Suggestion:
Update to version v1.4.32
https://github.com/xapian/xapian.git (GITHUB):
Affected version(s) =v2.0.0 <v2.1.0
Fix Suggestion:
Update to version v2.1.0
Related Resources (3)
https://trac.xapian.org/wiki/SecurityFixes/2018-07-02#a2026-08-13update
https://bugs.debian.org/1144490
https://lists.xapian.org/pipermail/xapian-devel/2026-August/003429.html
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CVSS v4
Base Score:
2.1
Attack Vector
NETWORK
Attack Complexity
HIGH
Attack Requirements
NONE
Privileges Required
LOW
User Interaction
PASSIVE
Vulnerable System Confidentiality
LOW
Vulnerable System Integrity
LOW
Vulnerable System Availability
NONE
Subsequent System Confidentiality
LOW
Subsequent System Integrity
LOW
Subsequent System Availability
NONE
CVSS v3
Base Score:
4.4
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
LOW
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality
LOW
Integrity
LOW
Availability
NONE
Weakness Type (CWE)
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CWE-79
EPSS
Base Score:
0.16