CVE-2026-55074Network attack vector

Jail escape via host-side symlink following

Published Sep 21, 2026 · Updated Sep 21, 2026

Link following in ansible-jailexec before 2.0.0 allows local users controlling a managed jail to write arbitrary files on its host. The put_file path is resolved and passed to root-run host-side mkdir and mv commands, which follow an in-jail symlink outside the jail. Exploitation requires a later file-transfer task to target the planted path; the resulting root-owned write enables jail escape and host compromise.

CVSS severity7.7
High
EPSS probability0.44%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Link following in ansible-jailexec before 2.0.0 allows local users controlling a managed jail to write arbitrary files on its host. The put_file path is resolved and passed to root-run host-side mkdir and mv commands, which follow an in-jail symlink outside the jail. Exploitation requires a later file-transfer task to target the planted path; the resulting root-owned write enables jail escape and host compromise.

The record

CVE
CVE-2026-55074
Published
Sep 21, 2026
Updated
Sep 21, 2026
Vendor
Christian Hofstede-Kuhn
Product
ansible-jailexec
Classifications
CWE-59, T1611
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 21, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 21, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 2.0.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Christian Hofstede-Kuhn · ansible-jailexecversion=< 2.0.0

Published CVSS scores

7.7GitHubCVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Activity data is delayed. The latest report is Sep 28, 2026.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-59Improper Link Resolution Before File Access ('Link Following')
T1611Escape to Host

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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