# CVE-2026-91752

## Summary

- **CVE ID:** CVE-2026-91752
- **Severity:** HIGH
- **CVSS Score:** 8.7 (CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N)
- **CWE:** CWE-789
- **Published:** Sep 15, 2026
- **Last Modified:** Sep 17, 2026

## Description

GNU libextractor before 1.15 contains a stack-based buffer overflow vulnerability in the process_star_office function that sizes a variable-length stack array from attacker-controlled OLE2 stream data. Attackers can craft malicious StarOffice documents that allocate up to 4 MB on the stack, causing stack overflow and crashing any application extracting metadata from the document.

## Affected Products

- GNU — libextractor (0)

## References

- [CNA](https://github.com/Haitam-lazaar/libextractor-ole2-rce)
- [CNA](https://git.gnunet.org/gnunet/libextractor/commit/04004eb19033e093938138b09befdf31e71e8522.html)
- [CNA](https://git.gnunet.org/gnunet/libextractor/commit/2781c7e9095f4ddaff4f535d69342f3903b18422.html)
- [CNA](https://www.gnu.org/software/libextractor/)
- [CNA](https://www.vulncheck.com/advisories/gnu-libextractor-before-1.15-stack-overflow-via-ole2)
- [CVE](http://www.openwall.com/lists/oss-security/2026/09/16/16)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.41%
- **EPSS Percentile:** 35.3

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-18._