{"id":"PYSEC-2026-3658","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 (\u003cjail filesystem root\u003e + \u003cdestination\u003e) 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 \u003cdir\u003e && cat \u003e \u003cdest\u003e for put_file; cat \u003c \u003csrc\u003e 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.","aliases":["CVE-2026-55074","GHSA-cxgv-hp74-jj7r"],"modified":"2026-08-19T12:45:04.208166170Z","published":"2026-08-19T11:56:26.241512Z","references":[{"type":"WEB","url":"https://github.com/chofstede/ansible_jailexec/security/advisories/GHSA-cxgv-hp74-jj7r"},{"type":"WEB","url":"https://github.com/chofstede/ansible_jailexec/commit/6e80eecb2db7aebd1258fded6ae5c3aba1dd4123"},{"type":"PACKAGE","url":"https://github.com/chofstede/ansible_jailexec"},{"type":"PACKAGE","url":"https://pypi.org/project/ansible-jailexec"},{"type":"ADVISORY","url":"https://github.com/advisories/GHSA-cxgv-hp74-jj7r"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-55074"}],"affected":[{"package":{"name":"ansible-jailexec","ecosystem":"PyPI","purl":"pkg:pypi/ansible-jailexec"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.0.0"}]}],"versions":["1.2.0","1.3.0"],"database_specific":{"source":"https://github.com/pypa/advisory-database/blob/main/vulns/ansible-jailexec/PYSEC-2026-3658.yaml"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N"}]}