What’s Vulnerable › Vulnerabilities

CVE-2026-108600: open-multi-agent 1.5.0 through 1.21.2 Sandbox Escape via file_write Dangling Symlink

• Severity: medium (CVSS 4.7 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-10-10 · updated 2026-10-16
• Weakness: CWE-59

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.

Affected products

• open-multi-agent: from 1.5.0 through 1.21.2

References

• https://github.com/open-multi-agent/open-multi-agent
• https://github.com/open-multi-agent/open-multi-agent/blob/6ec5498643c7e431aa66751f17f47a529e7f927c/packages/core/src/tool/built-in/file-write.ts#L67
• https://github.com/open-multi-agent/open-multi-agent/blob/6ec5498643c7e431aa66751f17f47a529e7f927c/packages/core/src/tool/built-in/path-safety.ts#L104-L113
• https://hackmd.io/@haind/open-multi-agent-file-write-dangling-symlink-escape
• https://www.vulncheck.com/advisories/open-multi-agent-1.5.0-through-1.21.2-sandbox-escape-via-file-write-dangling-symlink
• https://hackmd.io/@haind/open-multi-agent-file-write-dangling-symlink-escape

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