Vulnerability · Published Oct 13, 2026 · Assigned by GitHub_M

CVE-2026-104126JumpServer: Ansible Automation Template Rendering Allows Unsafe Lookup Plugin Invocation

Medium 6.0

In plain English

A medium-severity code injection in jumpserver from jumpserver. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 32% of all known vulnerabilities).

Severity (CVSS 3.1)6.0Medium

Exploit odds (30 days)0.4%top 68.2% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

JumpServer is an open source bastion host and an operation and maintenance security audit system. Prior to 4.10.17-lts, JumpServer's Ansible-based automation rendering can evaluate attacker-controlled template expressions from users who have permission to create or execute affected automation tasks. Crafted content can invoke sensitive Ansible lookup behavior, including file, pipe, env, and password lookups, within the Ansible execution context, which can disclose files or environment values and may permit limited command execution under the privileges of the automation process. The issue does not provide unauthenticated access or direct access to unrelated JumpServer assets. This issue is fixed in version 4.10.17-lts.

Affected products (as reported)

Vendor	Product	Versions
jumpserver	jumpserver	< 4.10.17

Weakness: CWE-94 · Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:L/A:L

References

https://github.com/jumpserver/jumpserver/security/advisories/GHSA-gr5x-5c4h-867g x_refsource_CONFIRM
https://github.com/jumpserver/jumpserver/pull/16886 x_refsource_MISC
https://github.com/jumpserver/jumpserver/commit/cc57ba0de5f6015746fae11cfc62402b11618e59 x_refsource_MISC
https://github.com/jumpserver/jumpserver/releases/tag/v4.10.17 x_refsource_MISC