Vulnerability in GNU Libextractor
CVE-2026-100310
GNU libextractor before 1.16 loads plugins from an untrusted search path specified by the LIBEXTRACTOR_PREFIX environment variable without proper privilege checks. A local attacker can exploit this by setting LIBEXTRACTOR_PREFIX to a directory containing a malicious plugin that executes arbitrary code with elevated privileges when loaded by a setuid or setgid program.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.0 (High). Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.001 (3.1th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 3rd percentile — 3.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.001 · newest: 0.001 · change: +0.000
Affected products
Weakness classification (CWE)
References
- github.com/Haitam-lazaar/libextractor-privesc (exploit, third-party-advisory)
- git.gnunet.org/gnunet/libextractor/commit/6edfa653c048800e24a17f7e8cc2bb42659b8… (patch)
- ftp.gnu.org/gnu/libextractor/ (release-notes)
- www.gnu.org/software/libextractor/ (product)
- VulnCheck Advisory: GNU libextractor before 1.16 Privilege Escalation via LIBEXTRACTOR_PREFIX (third-party-advisory)
- af854a3a-2127-422b-91ae-364da2661108
Frequently asked questions
- What is CVE-2026-100310?
- CVE-2026-100310 is a high-severity vulnerability in GNU Libextractor, classified under Untrusted Search Path. CVSS score: 7.0/10. Published 2026-09-25.
- How severe is CVE-2026-100310?
- High severity. CVSS v3 base score is 7.0 out of 10.