GNU libextractor up to 1.15 Plugin Loading LIBEXTRACTOR_PREFIX untrusted search path

Summaryinfo

A vulnerability described as critical has been identified in GNU libextractor up to 1.15. The impacted element is an unknown function of the component Plugin Loading. Such manipulation of the argument LIBEXTRACTOR_PREFIX leads to untrusted search path. This vulnerability is referenced as CVE-2026-100310. The attack can only be performed from a local environment. No exploit is available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability was found in GNU libextractor up to 1.15 and classified as critical. Affected by this issue is an unknown code block of the component Plugin Loading. The manipulation of the argument LIBEXTRACTOR_PREFIX with an unknown input leads to a untrusted search path vulnerability. Using CWE to declare the problem leads to CWE-426. The product searches for critical resources using an externally-supplied search path that can point to resources that are not under the product's direct control. Impacted is confidentiality, integrity, and availability. CVE summarizes:

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.

The advisory is available at github.com. This vulnerability is handled as CVE-2026-100310 since 09/25/2026. The exploitation is known to be difficult. Local access is required to approach this attack. Technical details are known, but there is no available exploit. This vulnerability is assigned to T1574 by the MITRE ATT&CK project.

Upgrading to version 1.16 eliminates this vulnerability.

If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Vendor

• GNU

Name

• libextractor

Version

• 1.0
• 1.1
• 1.2
• 1.3
• 1.4
• 1.5
• 1.6
• 1.7
• 1.8
• 1.9
• 1.10
• 1.11
• 1.12
• 1.13
• 1.14
• 1.15

License

• open-source

Website

• Vendor: https://www.gnu.org/

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If you want to get best quality of vulnerability data, you may have to visit VulDB.

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