Quick answers
- Is CVE-2026-63278 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-63278 being exploited in the wild.
- How severe is CVE-2026-63278?
- Informational severity, published 22 September 2026.
- Which products and versions are affected?
- The Document Foundation LibreOffice before 26.2.5.
- Is there a fix for CVE-2026-63278?
- A patch was published on 2026-09-21. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
- How is CVE-2026-63278 attacked?
- It is attacked over the network, in a web application.
- Am I affected by CVE-2026-63278?
- Check whether you run The Document Foundation LibreOffice at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Technical details
URLs in documents could trigger environment variable and INI file value expansion, leading to information disclosure when the document is opened. A prior fix for CVE-2024-12426 failed to catch all variations of package content provider naming, allowing bypass via alternative URL naming schemes. The fix in LibreOffice 26.2.5 properly matches the package content provider URI scheme during URL validation.
Affected products
- The Document Foundation LibreOffice before 26.2.5
Timeline
- 2026-09-21: disclosed
- 2026-09-21: patched