open-multi-agent up to 1.21.2 Sandbox file_write path traversal

Summaryinfo

A vulnerability classified as problematic was found in open-multi-agent up to 1.21.2. Affected by this vulnerability is the function file_write of the component Sandbox. The manipulation results in path traversal. This vulnerability is reported as CVE-2026-108600. The attack requires a local approach. No exploit exists.

Detailsinfo

A vulnerability, which was classified as problematic, was found in open-multi-agent up to 1.21.2. Affected is the function file_write of the component Sandbox. The manipulation with an unknown input leads to a path traversal vulnerability. CWE is classifying the issue as 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. This is going to have an impact on integrity. CVE summarizes:

open-multi-agent (@open-multi-agent/core) 1.5.0 through 1.21.2 contains a link following vulnerability in the file_write tool sandbox that allows attackers to create files outside the workspace root by using dangling symlinks. Attackers can plant a dangling symlink in the workspace and steer the agent via prompt injection to write attacker-influenced content anywhere the agent process can write.

The advisory is available at hackmd.io. This vulnerability is traded as CVE-2026-108600 since 10/10/2026. The exploitability is told to be easy. Local access is required to approach this attack. Successful exploitation requires user interaction by the victim. Technical details are known, but there is no available exploit. This vulnerability is assigned to T1006 by the MITRE ATT&CK project.

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

Name

• open-multi-agent

Version

• 1.21.0
• 1.21.1
• 1.21.2

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CPE 2.2info

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