Reference page — cumulative record through Saturday, October 3, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2026-100310

CVE-2026-100310HIGH

GNU libextractor before 1.16 Privilege Escalation via LIBEXTRACTOR_PREFIX

  AV  AC  AT  PR  UI  VC  VI  VA   CVSS    EPSS   %ile   KEV
   L   L   P   L   N   H   H   H    7.3   .0014    2.6     —

AFFECTED
  Product       Versions     Fixed
  libextractor  unspecified  —

TIMELINE
  Sep 25  Reserved by VulnCheck
  Sep 25  Published (CNA: VulnCheck)
  Sep 26  EXPLOIT PUBLISHED — CVE-2026-100310 (GNU libextractor). Public exploit reference added.
  Sep 29  EXPLOIT PUBLISHED — CVE-2026-100310 (GNU libextractor). Public exploit reference added.

CWE-426 · CNA: VulnCheck · CVSS v4.0 · 6 references · NVD status: Awaiting Analysis

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.

Lifecycle

Complete event history — 4 events, chronological
Date	Event	Detail
September 25, 2026	Reserved	Reserved by VulnCheck
September 25, 2026	Published	Published (CNA: VulnCheck)
September 26, 2026	EXPLOIT PUBLISHED	EXPLOIT PUBLISHED — CVE-2026-100310 (GNU libextractor). Public exploit reference added.
September 29, 2026	EXPLOIT PUBLISHED	EXPLOIT PUBLISHED — CVE-2026-100310 (GNU libextractor). Public exploit reference added.

Affected

Affected products and packages — 1 row
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
GNU	libextractor	—	—	—

Weaknesses

CWE-426

References (6)

Authoritative record: CVE-2026-100310 at cve.org

Vendors: gnu

Weaknesses: CWE-426

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-100310 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Saturday, October 3, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.