# CVE-2026-76181: Heap buffer overflow in dBASE index import

Status: published. Published: 2026-11-05. Updated: 2026-11-05.

LibreOffice includes a dBASE database driver, which reads dBASE tables and their .ndx index files when a folder of dBASE files is used as a data source. A heap buffer overflow existed when an index page was read. The number of entries recorded in a page was not checked against the number of entries the page could hold, which comes from a different field of the index header. A crafted index could also make a page refer back to itself, so that reading it recursed without end. In fixed versions the index header and the entry count of each page are limited to what an index page can hold, and a page that refers back to one of its parent pages is not followed.

## Remediation

No remediation reported in collected sources

## Affected products and versions

- The Document Foundation / LibreOffice: ≥ 26.2; < < 26.2.6 (affected, 26.2 series); ≥ 26.8; < < 26.8.1 (affected, 26.8 series). Source: CNA: Document Fdn.

## Severity and prioritization

- CVSS 4.0: 5.4 (medium); CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N/E:P; source: CNA: Document Fdn.

- CVSS 3.1: 6.6 (medium); CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:H; source: ADP: CISA-ADP

- CISA KEV: No listing in collected sources

- EPSS: Not available

- SSVC: exploitation none; automatable no; technical impact partial; source ADP: CISA-ADP

- Weaknesses: CWE-787, CWE-674

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://www.libreoffice.org/about-us/security/advisories/cve-2026-76181 (CNA: Document Fdn.)

## Provenance

- CNA: Document Fdn.: https://www.cve.org/CVERecord?id=CVE-2026-76181; retrieved 2026-11-05; source updated 2026-11-05

Revision: 494d27777dc92222fb318f0e87b2819e19a15c64d9590985eb6cef67f7dc159b

Canonical: https://y2.dev/cve/CVE-2026-76181

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