{"id":"CVE-2026-55074","aliases":["GHSA-cxgv-hp74-jj7r","PYSEC-2026-3658"],"url":"https://o3.security/vulnerability/CVE-2026-55074","summary":"Ansible FreeBSD Jail Connection Plugin: Jail escape via symlink following in put_file (host-side root mv)","details":"Through version 1.3.0, the jailexec connection plugin's put_file resolved a transfer's destination to a path on the jail host (<jail filesystem root> + <destination>) and ran mkdir -p and mv there as root on the host. Those commands follow symbolic links, and the path was operated on outside the jail, so a symlink existing inside the jail was followed by the host-side, root-privileged mv.\n\nA party controlling content inside a managed jail (the jail's root, or any process able to create a symlink in a directory an Ansible task later writes to) can therefore cause an arbitrary root-owned write on the host, outside the jail — a full jail escape. Arbitrary root-owned host writes are readily escalated to host compromise (e.g. cron, rc.d, authorized_keys).\n\nPreconditions: the operator runs a copy/template/fetch-style task (anything using put_file) against the jail, and the attacker can place a symlink inside the jail at or above the task's destination before the transfer runs.\n\nPatches: Fixed in 2.0.0. File transfers now run inside the jail via jexec (mkdir -p <dir> && cat > <dest> for put_file; cat < <src> for fetch_file), so every path resolves within the jail's chroot. An in-jail symlink can at most redirect within the same jail and can no longer reach the host.\n\nWorkarounds: None in affected versions; upgrade to 2.0.0.","published":"2026-09-21T14:24:55.995Z","modified":"2026-09-26T03:30:26.946340605Z","cvss":null,"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[{"ecosystem":"PyPI","name":"ansible-jailexec","fixedVersion":"2.0.0"}],"fix":{"url":"https://github.com/chofstede/ansible_jailexec/commit/6e80eecb2db7aebd1258fded6ae5c3aba1dd4123","label":"chofstede/ansible_jailexec@6e80eec"},"references":[{"type":"WEB","url":"https://github.com/chofstede/ansible_jailexec/releases/tag/v2.0.0"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/55xxx/CVE-2026-55074.json"},{"type":"ADVISORY","url":"https://github.com/chofstede/ansible_jailexec/blob/main/docs/security/advisory-2.0.0-jail-escape.md"},{"type":"ADVISORY","url":"https://github.com/chofstede/ansible_jailexec/security/advisories/GHSA-cxgv-hp74-jj7r"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-55074"},{"type":"FIX","url":"https://github.com/chofstede/ansible_jailexec/commit/6e80eecb2db7aebd1258fded6ae5c3aba1dd4123"},{"type":"FIX","url":"https://github.com/chofstede/ansible_jailexec/pull/6"},{"type":"PACKAGE","url":"https://github.com/chofstede/ansible_jailexec"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-09-26T03:30:26.946340605Z"}}