tjake Jlama up to 0.8.4/0.9.0-beta SafeTensorIndex.java SafeTensorIndex.loadWeights weight_map path traversal

Summaryinfo

A vulnerability described as critical has been identified in tjake Jlama up to 0.8.4/0.9.0-beta. Affected by this issue is the function SafeTensorIndex.loadWeights of the file jlama-core/src/main/java/com/github/tjake/jlama/safetensors/SafeTensorIndex.java. Executing a manipulation of the argument weight_map can lead to path traversal. The identification of this vulnerability is CVE-2026-126995. The attack may be launched remotely. Furthermore, there is an exploit available. The project was informed of the problem early through an issue report but has not responded yet.

Detailsinfo

A vulnerability classified as critical was found in tjake Jlama up to 0.8.4/0.9.0-beta. This vulnerability affects the function SafeTensorIndex.loadWeights of the file jlama-core/src/main/java/com/github/tjake/jlama/safetensors/SafeTensorIndex.java. The manipulation of the argument weight_map with an unknown input leads to a path traversal vulnerability. The CWE definition for the vulnerability is CWE-22. The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. As an impact it is known to affect confidentiality, integrity, and availability.

The advisory is available at github.com. This vulnerability was named CVE-2026-126995. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. Successful exploitation requires user interaction by the victim. Technical details and also a public exploit are known. This vulnerability is assigned to T1006 by the MITRE ATT&CK project.

It is possible to download the exploit at github.com. It is declared as proof-of-concept. The project was informed of the problem early through an issue report but has not responded yet.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Vendor

• tjake

Name

• Jlama

Version

• 0.8.0
• 0.8.1
• 0.8.2
• 0.8.3
• 0.8.4
• 0.9.0-beta

Website

• Product: https://github.com/tjake/Jlama/

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Submitinfo

Accepted

• Submit #1040636: tjake Jlama 0.9.0-beta, commit 7b8ba424dd72 Path Traversal (by Dem00000)

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