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Vulnerability · Published Sep 15, 2026 · Assigned by VulnCheck

CVE-2026-91752GNU libextractor before 1.15 Stack Overflow via OLE2

High 7.5

In plain English

A high-severity security flaw in libextractor from GNU. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.7% (higher than 55% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)7.5High
Exploit odds (30 days)0.7%top 45.2% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known

Official 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 packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12libextractorno fix listedDEBIAN-CVE-2026-91752
Debian:13libextractorno fix listedDEBIAN-CVE-2026-91752
Debian:14libextractor1:1.17-1DEBIAN-CVE-2026-91752
Ubuntu:22.04:LTSlibextractorno fix listedUBUNTU-CVE-2026-91752
Ubuntu:24.04:LTSlibextractorno fix listedUBUNTU-CVE-2026-91752
Ubuntu:26.04:LTSlibextractorno fix listedUBUNTU-CVE-2026-91752
Ubuntu:26.10libextractorno fix listedUBUNTU-CVE-2026-91752

Affected products (as reported)

VendorProductVersions
GNU libextractor 0 – before 1.15

Weakness: CWE-789 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References