JumpServer: Ansible Automation Template Rendering Allows Unsafe Lookup Plugin Invocation

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-104126
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-10-13 17:17:15 UTC
Updated2026-10-16 23:16:58 UTC
DescriptionJumpServer 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.

Risk And Classification

Primary CVSS: v3.1 6 MEDIUM from [email protected]

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:L/A:L

EPSS: 0.003770000 probability, percentile 0.300870000 (date 2026-10-16)

Problem Types: CWE-94 | CWE-94 CWE-94: Improper Control of Generation of Code ('Code Injection')

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary6MEDIUMCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:L/A:L
3.1CNADECLARED6MEDIUMCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:L/A:L

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
High
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
Low
Availability
Low

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:L/A:L

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Jumpserver Jumpserver affected < 4.10.17 Not specified

References

ReferenceSourceLinkTags
github.com/jumpserver/jumpserver/releases/tag/v4.10.17 [email protected] github.com
github.com/jumpserver/jumpserver/security/advisories/GHSA-gr5x-5c4h-867g [email protected] github.com
github.com/jumpserver/jumpserver/commit/cc57ba0de5f6015746fae11cfc62402b... [email protected] github.com
github.com/jumpserver/jumpserver/pull/16886 [email protected] github.com
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