# CVE-2026-77643: xapian-core: A cross-site scripting vulnerability in  queryparser/termgenerator_internal.cc in Xapian xapian-core before 2.1.0 and...

CVE-2026-77643 is fixed in xapian-core on 1 platform, first by DEBIAN-CVE-2026-77643, released August 21, 2026. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2026-77643
- Priority: Routine
- CVSS: 4.4 (medium)
- EPSS: 0.0025
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: 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.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | xapian-core Debian 13.5 (trixie) | 1.4.29-3+deb13u1 | [DEBIAN-CVE-2026-77643](https://patchblox.com/security/data/fix/linux/debian-cve-2026-77643.md) | Aug 21, 2026 |
| Linux | xapian-core Debian 14 | 1.4.32-1 | [DEBIAN-CVE-2026-77643](https://patchblox.com/security/data/fix/linux/debian-cve-2026-77643.md) | Aug 21, 2026 |

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Data as of 2026-11-08T00:53:09Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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