CVE-2026-108600
open-multi-agent 1.5.0 through 1.21.2 Sandbox Escape via file_write Dangling Symlink
- State
- Published
- Severity
- 5.7 Medium
- Published
- Oct 10, 2026
- Updated
- Oct 13, 2026
- Reserved
- Oct 10, 2026
Description
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 5.7 Medium | CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:P/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N | VulnCheck |
| 3.1 | 4.7 Medium | CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N | VulnCheck |
Weaknesses
- CWE-59 Improper Link Resolution Before File Access ('Link Following')
Affected Products
| Product | Versions |
|---|---|
open-multi-agentopen-multi-agent |
|
References
- https://hackmd.io/@haind/open-multi-agent-file-write-dangling-symlink-escapethird-party-advisory
- https://github.com/open-multi-agent/open-multi-agent/blob/6ec5498643c7e431aa66751f17f47a529e7f927c/packages/core/src/tool/built-in/path-safety.ts#L104-L113technical-description
- https://github.com/open-multi-agent/open-multi-agent/blob/6ec5498643c7e431aa66751f17f47a529e7f927c/packages/core/src/tool/built-in/file-write.ts#L67technical-description
- https://github.com/open-multi-agent/open-multi-agentproduct
- VulnCheck Advisory: open-multi-agent 1.5.0 through 1.21.2 Sandbox Escape via file_write Dangling Symlinkthird-party-advisory
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