What’s Vulnerable › Vulnerabilities
CVE-2026-8358: Heap buffer overflow in spreadsheet tracked-changes import
- Severity: medium (CVSS 5.4 v4.0)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.2% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-06-15 · updated 2026-10-25
- Weakness: CWE-787
Description
LibreOffice Calc can import tracked changes from a spreadsheet document. A heap buffer overflow existed when a document reused the same change identifier for two different kinds of change. The importer then treated one change object as a different, larger type and wrote past the end of its allocation. In fixed versions records with a duplicate identifier are rejected.
Affected products
- The Document Foundation LibreOffice: from 25.8 before < 25.8.7; from 26.2 before < 26.2.4 — fixed in < 25.8.7, < 26.2.4
How to fix
Upgrade to a fixed version: The Document Foundation LibreOffice < 25.8.7, < 26.2.4. Check the vendor advisory for mitigations.
References
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