Vulnerability in GNU Libextractor
CVE-2026-91752
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.007 (54.5th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 54th percentile — 54.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: 0.000
Affected products
Weakness classification (CWE)
References
- github.com/Haitam-lazaar/libextractor-ole2-rce (exploit, third-party-advisory)
- git.gnunet.org/gnunet/libextractor/commit/04004eb19033e093938138b09befdf31e71e8… (patch)
- git.gnunet.org/gnunet/libextractor/commit/2781c7e9095f4ddaff4f535d69342f3903b18… (patch)
- www.gnu.org/software/libextractor/ (product)
- www.vulncheck.com/advisories/gnu-libextractor-before-1.15-stack-overflow-via-ol… (third-party-advisory)
- af854a3a-2127-422b-91ae-364da2661108
Frequently asked questions
- What is CVE-2026-91752?
- CVE-2026-91752 is a high-severity vulnerability in GNU Libextractor, classified under CWE-789. CVSS score: 7.5/10. Published 2026-09-15.
- How severe is CVE-2026-91752?
- High severity. CVSS v3 base score is 7.5 out of 10.