7.3

CVE-2026-100310: gnu libextractor Untrusted Search Path

CVSS: 7.3v4.0HighAwaiting analysis
AliasesUBUNTU-CVE-2026-100310DEBIAN-CVE-2026-100310
Published 25-09-2026Last modified 30-09-2026
Open JSON

Vulnerability summary

CVE-2026-100310 is a high (CVSS 7.3) Untrusted Search Path vulnerability in gnu libextractor. EPSS estimates a 0.14% chance of exploitation in the next 30 days, higher than 2.7% of scored vulnerabilities. 1 public exploit is recorded.

Overall risk
39/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.3/10
010
High · v4.0 (CVE.org)
EPSS score
0.14%
0%100%
Low · Change unavailable
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1github

Advisory lineage

Upstream 0 · Downstream 1
MGASA-2026-0484

Timeline

  1. 25-09-2026
    PublishedVulnerability first disclosed.
  2. 30-09-2026
    Last modifiedVulnerability information updated.

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 metrics

7 scores · 4 sources · 2 versions

EPSS trend

Probability

0.14%

Chance of exploitation in the next 30 days

Percentile

3%

Versus all other CVEs

30-day change

Change unavailable

Change unavailable

26-09-202618-10-2026
EPSS score
0.14%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

1 found
  • githubUnverified

    Libextractor Privesc

    Maturity: poc

Weaknesses

CWE · root cause

Affected systems

Debian1 product
  • libextractorAll versions (No fix recorded) | < 1:1.17-1
Gnu1 product
Ubuntu1 product
  • libextractorAll versions (No fix recorded)

3 vendors · 3 products

References

10 links