---
title: "CVE-2026-100310: GNU libextractor - Privilege Escalation"
description: "GNU libextractor before 1.16 contains a privilege escalation caused by loading plugins from an untrusted search path specified by LIBEXTRACTOR_PREFIX without proper privilege checks, letting local attackers execute arbitrary code with elevated privileges, exploit requires setuid or setgid program execution."
url: https://panop.io/threat-heartbeat/CVE-2026-100310/
---

# CVE-2026-100310 GNU libextractor - Privilege Escalation

GNU libextractor before 1.16 contains a privilege escalation caused by loading plugins from an untrusted search path specified by LIBEXTRACTOR\_PREFIX without proper privilege checks, letting local attackers execute arbitrary code with elevated privileges, exploit requires setuid or setgid program execution.

CVSS base score 7.0 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Required

EPSS

0.14% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-100310)

## Details

Type

Privilege Escalation

Impact

Privilege Escalation, Remote Code Execution

CVSS vector

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

Published

25 September 2026

Updated

15 October 2026

Weakness

[CWE-426](https://cwe.mitre.org/data/definitions/426.html)

## Vendor fix

Upgrade to version 1.16 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-100310](https://nvd.nist.gov/vuln/detail/CVE-2026-100310)
- [https://github.com/Haitam-lazaar/libextractor-privesc](https://github.com/Haitam-lazaar/libextractor-privesc)
- [https://www.gnu.org/software/libextractor/](https://www.gnu.org/software/libextractor/)
- [https://www.vulncheck.com/advisories/gnu-libextractor-before-1.16-privilege-escalation-via-libextractor-prefix](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](http://www.openwall.com/lists/oss-security/2026/09/25/25)
- [https://ftp.gnu.org/gnu/libextractor/](https://ftp.gnu.org/gnu/libextractor/)
- [https://git.gnunet.org/gnunet/libextractor/commit/6edfa653c048800e24a17f7e8cc2bb42659b8d01.html](https://git.gnunet.org/gnunet/libextractor/commit/6edfa653c048800e24a17f7e8cc2bb42659b8d01.html)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

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