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
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
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)
- www.vulncheck.com/advisories/gnu-libextractor-before-1.16-privilege-escalation-… (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.