CVE-2026-55074 json
Ansible FreeBSD Jail Connection Plugin: Jail escape via symlink following in put_file (host-side root mv)
published 2026-08-12 2 mo ago modified 2026-09-24 45 d ago also GHSA-cxgv-hp74-jj7r , PYSEC-2026-3658 , EUVD-2026-83940
- cvss
- 8.2
- version 4.0, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.4%
- EPSS 0.4% chance of exploitation in 30 days, percentile 38%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- pypi ansible-jailexec 2.0.0
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 48 d ago
Exploit prediction
0.44% chance of exploitation in the next 30 days, higher than 38% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 8.2 | CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N |
| CNA | 4.0 | 8.2 | CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| pypi | ansible-jailexec | <2.0.0 |
2.0.0 |
Affected products
- chofstede ansible_jailexec
Classification
- Weakness
-
- CWE-59 Improper Link Resolution Before File Access
References
- github.com /chofstede/ansible_jailexec/pull/6
-
github.com
/chofstede/ansible_jailexec/commit/6e80eecb2db7aebd1258fded6ae5c3aba1dd4123
web
-
github.com
/chofstede/ansible_jailexec/security/advisories/GHSA-cxgv-hp74-jj7r
web
- github.com /chofstede/ansible_jailexec/blob/main/docs/security/advisory-2.0.0-jail-escape.md
- github.com /chofstede/ansible_jailexec/releases/tag/v2.0.0
-
github.com
/chofstede/ansible_jailexec
package
-
pypi.org
/project/ansible-jailexec
package
-
github.com
/advisories/GHSA-cxgv-hp74-jj7r
advisory
-
nvd.nist.gov
/vuln/detail/CVE-2026-55074
advisory
Sources
- CVE List CVE-2026-55074
- GitHub Advisory GHSA-cxgv-hp74-jj7r
- NVD CVE-2026-55074
- OSV PYSEC-2026-3658
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