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Vulnerability record · CVE-2026-100310 · published 25 September 2026

CVE-2026-100310: Untrusted search path vulnerability

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.

7.3 CVSS 4.0 High EPSS 0.14% · top 97.5% CWE-426 · Untrusted search path Received
7.3CVSS 4.0 base score
0.14%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
6References
26 Sep 2026Last modified by NVD

Description

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.

CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

References

LinkTags
https://ftp.gnu.org/gnu/libextractor/
https://git.gnunet.org/gnunet/libextractor/commit/6edfa653c048800e24a17f7e8cc2bb42659b8d01.html
https://github.com/Haitam-lazaar/libextractor-privesc
https://www.gnu.org/software/libextractor/
https://www.vulncheck.com/advisories/gnu-libextractor-before-1.16-privilege-escalation-via-libextractor-prefix
http://www.openwall.com/lists/oss-security/2026/09/25/25

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Source: NIST National Vulnerability Database (record CVE-2026-100310), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.