---
cve: "CVE-2026-91752"
severity: "HIGH"
cvss: 8.7
epss: "0.7%"
vendor: "GNU"
kev: false
exploited: false
published: "2026-09-15 01:16:54"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-10-07T18:44:07+02:00"
---

# CVE-2026-91752

> 8.7 HIGH · 🧪 PoC

## Beschreibung

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.

## CISA-Anreicherung (vulnrichment/ADP)

- CISA-SSVC (Coordinator, v2.0.3):
  - Exploitation: **poc**
  - Automatable: **yes**
  - Technical Impact: **partial**

## CVSS-Vektor

```
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
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Gering | bad |
| PR Privilegien | Keine | bad |
| UI Interaktion | Keine | bad |

## Referenzen

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

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/sicherheitsluecken/cve-2026-91752/) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI WID (CSAF)_