CVE-2026-77643: Improper Neutralization of Input During Web Page Generation

A cross-site scripting vulnerability in queryparser/termgeneratorinternal.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...

The vulnerability of the Xapian::MSet::snippet() function in the Xapian search library (xapian-core) allows a hacker to execute cross-site scripts.

The vulnerability of the Xapian::MSet::snippet function “queryparser/termgeneratorinternal.cc” from the Xapian full-text search library xapian-core is related to insufficient protection of the web page structure. Exploiting this vulnerability could allow a malicious actor to execute cross-site...