CVE-2026-100310

HIGHPre-NVD 7.07.0—
EchelonGraph scoreHIGH confidence

Score 7.0 from GitHub Security Advisory (severity: HIGH) published 2026-09-25. A secondary CVSS source baseline 7.0; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this weekElevated
7.0EG
EchelonGraph verdictPlan mitigationSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.1%CVSS: 7.0Exploit: Elevated riskExposed services: Not assessed

No fix is confirmed yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for the fix.

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 v3
7.0
EG Score
7.0HIGHhigh confidence
EG Risk
48
EG Risk 48/100CISA SSVC

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity70% × 45%
Exploitation40% × 40%
Automatability0% × 15%
CISA SSVC: Track at low, Track* at medium and Attend at high mission impact.
Action: No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines at low or medium mission impact and sooner than that at high, and watch the vendor's advisory for the fix.
EPSS PROB
0.1%
EPSS %ILE
2nd
KEV
Not listed

CISA SSVCTrack at low, Track* at medium and Attend at high mission impact.

No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines at low or medium mission impact and sooner than that at high, and watch the vendor's advisory for the fix.

Exploitation public PoC (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

September 25, 2026

Last Modified

September 30, 2026

Advisory Details (4)

Auto-updated Sep 25, 2026
🔬 Proof of concept available. No patch confirmed yet.
generic

GNU libextractor before 1.16 Privilege Escalation via LIBEXTRACTOR_PREFIX | Advisories | VulnCheck

https://www.vulncheck.com/advisories/gnu-libextractor-before-1.16-privilege-escalation-via-libextractor-prefix
generic

Libextractor - GNU Project - Free Software Foundation

https://www.gnu.org/software/libextractor/
generic

misc minor bugfixes - libextractor - GNU libextractor

https://git.gnunet.org/gnunet/libextractor/commit/6edfa653c048800e24a17f7e8cc2bb42659b8d01.html
generic🟡 PoC Available

GitHub - Haitam-lazaar/libextractor-privesc: PoC for a Local Privilege Escalation (LPE) in GNU libextractor ≤ 1.15. Exploits an untrusted search path via the LIBEXTRACTOR_PREFIX environment variable. Allows unprivileged users to execute arbitrary code as root when a setuid binary links against the library. · GitHub

https://github.com/Haitam-lazaar/libextractor-privesc

Vendor Advisories for CVE-2026-100310(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Affected Packages

(3 across 3 ecosystems)
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
libextractor1:1.11-7 ... 1:1.19-2 (16 versions)
  • every version on: no fix on record
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
libextractor1:1.13-10 ... 1:1.19-2 (6 versions)
  • every version on: no fix on record
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
libextractor1:1.13-10, 1:1.13-8, 1:1.13-9
  • every version up to 1:1.17-1: fixed in 1:1.17-1
—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 32× in last 7d / 46× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-10-05 10:06 UTCEG score recompute
  2. 2026-10-05 10:06 UTCGHSA enrichment
  3. 2026-10-04 23:21 UTCEPSS rescore
  4. 2026-10-04 21:38 UTCGHSA enrichment
  5. 2026-10-04 09:11 UTCGHSA enrichment
  6. 2026-10-03 20:44 UTCEG score recompute
  7. 2026-10-03 20:44 UTCGHSA enrichment
  8. 2026-10-03 14:25 UTCEPSS rescore
  9. 2026-10-03 08:12 UTCGHSA enrichment
  10. 2026-10-02 19:42 UTCEG score recompute
  11. 2026-10-02 19:42 UTCGHSA enrichment
  12. 2026-10-02 07:14 UTCEG score recompute
  13. 2026-10-02 07:14 UTCGHSA enrichment
  14. 2026-10-01 19:49 UTCEPSS rescore
  15. 2026-10-01 18:47 UTCGHSA enrichment
  16. 2026-10-01 06:15 UTCGHSA enrichment
  17. 2026-09-30 17:48 UTCEG score recompute
  18. 2026-09-30 17:48 UTCGHSA enrichment
  19. 2026-09-30 15:02 UTCEPSS rescore
  20. 2026-09-30 13:57 UTCGHSA enrichment
  21. 2026-09-30 01:30 UTCEG score recompute
  22. 2026-09-30 01:30 UTCGHSA enrichment
  23. 2026-09-30 00:39 UTCEG score recompute
  24. 2026-09-30 00:39 UTCGHSA enrichment
  25. 2026-09-29 16:46 UTCEG score recompute
Show 21 more
  1. 2026-09-29 16:46 UTCGHSA enrichment
  2. 2026-09-29 15:20 UTCEPSS rescore
  3. 2026-09-29 04:10 UTCEG score recompute
  4. 2026-09-29 04:10 UTCGHSA enrichment
  5. 2026-09-28 15:43 UTCEG score recompute
  6. 2026-09-28 15:43 UTCGHSA enrichment
  7. 2026-09-28 13:50 UTCEPSS rescore
  8. 2026-09-28 03:16 UTCGHSA enrichment
  9. 2026-09-27 14:49 UTCEG score recompute
  10. 2026-09-27 14:48 UTCGHSA enrichment
  11. 2026-09-27 02:22 UTCEG score recompute
  12. 2026-09-27 02:22 UTCGHSA enrichment
  13. 2026-09-26 15:58 UTCEPSS rescore
  14. 2026-09-26 13:54 UTCGHSA enrichment
  15. 2026-09-26 01:20 UTCEG score recompute
  16. 2026-09-26 01:20 UTCGHSA enrichment
  17. 2026-09-26 00:37 UTCEG score recompute
  18. 2026-09-26 00:37 UTCGHSA enrichment
  19. 2026-09-25 20:37 UTCEG score recompute
  20. 2026-09-25 19:46 UTCEG score recompute
  21. 2026-09-25 19:45 UTCMITRE cvelistV5first tracked

Related CVEs(same product + same CWE)

Frequently asked(5)

What is CVE-2026-100310?
CVE-2026-100310 is a high vulnerability published on September 25, 2026. GNU libextractor before 1.16 loads plugins from an untrusted search path specified by the LIBEXTRACTORPREFIX environment variable without proper privilege checks. A local attacker can exploit this by setting LIBEXTRACTORPREFIX to a directory containing a malicious plugin that executes arbitrary…
When was CVE-2026-100310 disclosed?
CVE-2026-100310 was first published on September 25, 2026, with the most recent update on September 30, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-100310 actively exploited?
CVE-2026-100310 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.1% probability of exploitation in the next 30 days (2nd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-100310?
CVE-2026-100310 has a CVSS base score of 7.0 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-100310?
No fix for CVE-2026-100310 is confirmed yet. Until one is published, restrict network exposure of the affected system or apply the vendor's mitigation — for example, keep it off the internet or limit it to trusted networks — and watch the vendor's advisory for the fix. The vendor advisories EchelonGraph has for CVE-2026-100310 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-100310

Explore →

Is Your Infrastructure Affected by CVE-2026-100310?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Book a Demo →Browse All CVEs