CVE-2026-100310 is a vulnerability in GNU Libextractor
Published on September 25, 2026
GNU libextractor before 1.16 Privilege Escalation via LIBEXTRACTOR_PREFIX
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.
Vulnerability Analysis
CVE-2026-100310 is exploitable with local system access, and requires small amount of user privileges. This vulnerability is considered to have a low attack complexity. Public availability of a proof of concept (POC) exploit exists for CVE-2026-100310. The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality and integrity and availability.
Weakness Type
What is an Untrusted Path Vulnerability?
The application searches for critical resources using an externally-supplied search path that can point to resources that are not under the application's direct control.
CVE-2026-100310 has been classified to as an Untrusted Path vulnerability or weakness.
Products Associated with CVE-2026-100310
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Affected Versions
GNU libextractor:- Before 1.16 is affected.
Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.