---
id: CVE-2026-91752
title: >-
  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
summary: >-
  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 StarO…
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'
cwe:
  - CWE-789
vendor: GNU
product: libextractor
affected:
  - libextractor < 1.15
published: '2026-09-15'
updated: '2026-09-24'
sourceUpdated: '2026-09-24T21:04:40.340'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-91752'
references:
  - url: >-
      https://git.gnunet.org/gnunet/libextractor/commit/04004eb19033e093938138b09befdf31e71e8522.html
    label: disclosure@vulncheck.com
  - url: >-
      https://git.gnunet.org/gnunet/libextractor/commit/2781c7e9095f4ddaff4f535d69342f3903b18422.html
    label: disclosure@vulncheck.com
  - url: 'https://github.com/Haitam-lazaar/libextractor-ole2-rce'
    label: disclosure@vulncheck.com
  - url: 'https://www.gnu.org/software/libextractor/'
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/gnu-libextractor-before-1.15-stack-overflow-via-ole2
    label: disclosure@vulncheck.com
  - url: 'http://www.openwall.com/lists/oss-security/2026/09/16/16'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-91752.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-91752'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-91752'
tags:
  - nvd
  - cve.org
  - exploit-available
  - csaf
  - vex
  - red-hat
epss: 0.0074
epssPercentile: 0.52742
exploitAvailable: true
ssvc:
  exploitation: poc
  automatable: 'yes'
  technicalImpact: partial
  timestamp: '2026-09-17T18:37:51.070693Z'
ingestedAt: '2026-09-15T01:18:29.937Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

## Vendor advisories

- **Red Hat VEX** · updated 2026-09-15 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-91752.json)