CVE-2026-4430: CWE-787 Out-of-bounds write in The Document Foundation LibreOffice
CVE-2026-4430 is an out-of-bounds write vulnerability in The Document Foundation's LibreOffice affecting versions 26. 2 before 26. 2. 3 and 25. 8 before 25. 8. 7. The flaw arises when processing crafted OOXML documents with mismatched encryption salt parameters. This vulnerability has a medium severity rating with a CVSS 4. 0 base score of 5.
AI Analysis
Technical Summary
This vulnerability (CVE-2026-4430) involves an out-of-bounds write (CWE-787) in LibreOffice versions 26.2 prior to 26.2.3 and 25.8 prior to 25.8.7. It occurs when LibreOffice processes specially crafted OOXML documents that contain mismatched encryption salt parameters, potentially leading to memory corruption. The CVSS 4.0 vector indicates local attack vector with low complexity, no privileges required, user interaction needed, and high impact on availability. The issue is published and assigned by The Document Foundation but currently lacks an official remediation level or patch.
Potential Impact
Successful exploitation could lead to memory corruption due to out-of-bounds write, which may affect the availability of the application. The CVSS score reflects a medium severity impact primarily on availability. There are no reports of active exploitation in the wild.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, users should exercise caution when opening OOXML documents from untrusted sources, especially those that may contain encryption. Monitor The Document Foundation's advisories for updates and apply patches promptly once available.
CVE-2026-4430: CWE-787 Out-of-bounds write in The Document Foundation LibreOffice
Description
CVE-2026-4430 is an out-of-bounds write vulnerability in The Document Foundation's LibreOffice affecting versions 26. 2 before 26. 2. 3 and 25. 8 before 25. 8. 7. The flaw arises when processing crafted OOXML documents with mismatched encryption salt parameters. This vulnerability has a medium severity rating with a CVSS 4. 0 base score of 5.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-4430) involves an out-of-bounds write (CWE-787) in LibreOffice versions 26.2 prior to 26.2.3 and 25.8 prior to 25.8.7. It occurs when LibreOffice processes specially crafted OOXML documents that contain mismatched encryption salt parameters, potentially leading to memory corruption. The CVSS 4.0 vector indicates local attack vector with low complexity, no privileges required, user interaction needed, and high impact on availability. The issue is published and assigned by The Document Foundation but currently lacks an official remediation level or patch.
Potential Impact
Successful exploitation could lead to memory corruption due to out-of-bounds write, which may affect the availability of the application. The CVSS score reflects a medium severity impact primarily on availability. There are no reports of active exploitation in the wild.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, users should exercise caution when opening OOXML documents from untrusted sources, especially those that may contain encryption. Monitor The Document Foundation's advisories for updates and apply patches promptly once available.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- Document Fdn.
- Date Reserved
- 2026-03-19T14:58:41.694Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 69fc4109cbff5d8610b85d64
Added to database: 5/7/2026, 7:36:41 AM
Last enriched: 5/7/2026, 7:51:30 AM
Last updated: 5/7/2026, 8:40:48 AM
Views: 5
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