High severity · published Sep 15, 2026
CVE-2026-91752
GNU libextractor before 1.15 Stack Overflow via OLE2
7.5
CVSS
0.7%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.7% · higher than 54% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
LI
libextractor · GNU
before 1.15 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-91752
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-91752
git.gnunet.org
https://git.gnunet.org/gnunet/libextractor/commit/04004eb19033e093938138b09befdf31e71e8522.html
git.gnunet.org
https://git.gnunet.org/gnunet/libextractor/commit/2781c7e9095f4ddaff4f535d69342f3903b18422.html
github.com
https://github.com/Haitam-lazaar/libextractor-ole2-rce
www.gnu.org
https://www.gnu.org/software/libextractor/
www.vulncheck.com
https://www.vulncheck.com/advisories/gnu-libextractor-before-1.15-stack-overflow-via-ole2
www.openwall.com
http://www.openwall.com/lists/oss-security/2026/09/16/16
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