High severity · published Sep 25, 2026
CVE-2026-100310
GNU libextractor before 1.16 Privilege Escalation via LIBEXTRACTOR_PREFIX
7.0
CVSS
0.1%
EPSS
No
On KEV
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 vector
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack vector
Local
Complexity
High
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.1% · higher than 3% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
LI
libextractor · GNU
before 1.16 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-100310
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-100310
exploit
https://github.com/Haitam-lazaar/libextractor-privesc
patch
https://git.gnunet.org/gnunet/libextractor/commit/6edfa653c048800e24a17f7e8cc2bb42659b8d01.html
release-notes
https://ftp.gnu.org/gnu/libextractor/
product
https://www.gnu.org/software/libextractor/
third-party-advisory
https://www.vulncheck.com/advisories/gnu-libextractor-before-1.16-privilege-escalation-via-libextractor-prefix
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