CVE-2026-55074
HighCVSS 8.2Exploitation Probability (EPSS)
Low risk36th percentile - higher than 36% of all known CVEs
Summary
In the Ansible FreeBSD Jail Connection Plugin through version 1.3.0, the jailexec connection plugin's put_file resolved a transfer's destination to a path on the jail host 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. A party controlling content inside a managed jail can therefore cause an arbitrary root-owned write on the host, outside the jail — a full jail escape.
Risk Assessment
The vulnerability allows a full jail escape and arbitrary root-owned file writes on the host, which readily escalate to host compromise (e.g. cron, rc.d, authorized_keys). This poses a critical risk for environments using the plugin to manage FreeBSD jails.
Recommendation
Upgrade the plugin to version 2.0.0 or later. Until patched, restrict the ability of untrusted parties to create symlinks inside managed jails.
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Original NVD description (English source)
Ansible FreeBSD Jail Connection Plugin is an Ansible connection plugin for FreeBSD Jails via jexec. Through version 1.3.0, the jailexec connection plugin's put_file resolved a transfer's destination to a path on the jail host ( + ) 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. A 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). Preconditions for this vulnerability are that 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. This issue has been fixed in version 2.0.0.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS