{"id":"CVE-2026-108600","summary":"open-multi-agent 1.5.0 through 1.21.2 Sandbox Escape via file_write Dangling Symlink","details":"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.","modified":"2026-10-12T02:30:58.898222830Z","published":"2026-10-10T18:58:16.432Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/108xxx/CVE-2026-108600.json","cna_assigner":"VulnCheck","cwe_ids":["CWE-59"]},"references":[{"type":"WEB","url":"https://www.npmjs.com"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/108xxx/CVE-2026-108600.json"},{"type":"ADVISORY","url":"https://hackmd.io/@haind/open-multi-agent-file-write-dangling-symlink-escape"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-108600"},{"type":"ADVISORY","url":"https://www.vulncheck.com/advisories/open-multi-agent-1.5.0-through-1.21.2-sandbox-escape-via-file-write-dangling-symlink"},{"type":"PACKAGE","url":"https://github.com/open-multi-agent/open-multi-agent"},{"type":"ARTICLE","url":"https://github.com/open-multi-agent/open-multi-agent/blob/6ec5498643c7e431aa66751f17f47a529e7f927c/packages/core/src/tool/built-in/file-write.ts#L67"},{"type":"ARTICLE","url":"https://github.com/open-multi-agent/open-multi-agent/blob/6ec5498643c7e431aa66751f17f47a529e7f927c/packages/core/src/tool/built-in/path-safety.ts#L104-L113"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/open-multi-agent/open-multi-agent","events":[{"introduced":"995ce60f62dda66e4f5dcd24f60b3c1e3aab0ca8"},{"fixed":"6ec5498643c7e431aa66751f17f47a529e7f927c"}],"database_specific":{"extracted_events":[{"introduced":"1.5.0"},{"last_affected":"1.21.2"},{"fixed":"1.21.2"}],"source":["AFFECTED_FIELD","DESCRIPTION"]}}],"versions":["v1.21.1","v1.21.0","v1.20.0","v1.19.0","v1.18.0","v1.17.0","v1.16.1","v1.16.0","v1.15.0","v1.14.0","v1.13.0","v1.12.1","v1.11.0","v1.10.0","v1.9.0","v1.8.1","v1.8.0","v1.7.0","v1.6.0","v1.5.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-108600.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"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"}]}