CVE-2026-108600
open-multi-agent 1.5.0 through 1.21.2 Sandbox Escape via file_write Dangling Symlink
CVSS Score
4.7
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-59 |
| Vendor | open-multi-agent |
| Product | open-multi-agent |
| Published | Oct 10, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N Attack Vector
Local
Attack Complexity
High
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
None
Integrity
High
Availability
None
Affected Versions
open-multi-agent / open-multi-agent
1.5.0 ≤ 1.21.2
References
hackmd.io: https://hackmd.io/@haind/open-multi-agent-file-write-dangling-symlink-escape github.com: https://github.com/open-multi-agent/open-multi-agent/blob/6ec5498643c7e431aa66751f17f47a529e7f927c/packages/core/src/tool/built-in/path-safety.ts#L104-L113 github.com: https://github.com/open-multi-agent/open-multi-agent/blob/6ec5498643c7e431aa66751f17f47a529e7f927c/packages/core/src/tool/built-in/file-write.ts#L67 github.com: https://github.com/open-multi-agent/open-multi-agent vulncheck.com: https://www.vulncheck.com/advisories/open-multi-agent-1.5.0-through-1.21.2-sandbox-escape-via-file-write-dangling-symlink
Credits
HaiND from the Post and Telecommunication Institute of Technology