CVE-2026-91925 Details
Description
Polyaxon through 2.16.4 renders operation specification fields with an unsandboxed Jinja2 environment during server-side run preparation, allowing authenticated users to execute arbitrary code. Attackers can submit runs with Jinja2 payloads in queue, namespace, conditions, presets, or dependencies fields to execute operating system commands in the scheduler process context, exposing database credentials and service tokens.
A server-side template injection vulnerability has been identified in Polyaxon versions through 2.16.4. The issue arises because the application uses an unsandboxed Jinja2 environment to render operation specification fields. This vulnerability allows authenticated users to execute arbitrary code by injecting Jinja2 payloads into specific fields of the operation specification. When the server processes these runs, the injected code is executed in the context of the scheduler process, potentially exposing sensitive information such as database credentials and service tokens.
Users can upgrade to Polyaxon version 2.17.0 or later, where this vulnerability has been fixed. In the patched version, the Jinja2 environment is properly sandboxed, preventing the execution of arbitrary code.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Sep 15, 2026CISA-ADP
Assessed Sep 15, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/polyaxon/cli/blob/bfea04a0bf93886f69a3195954204d9d010b55aa/cli/polyaxon/_polyaxonfile/specs/libs/engine.py | [email protected] | Source CodeVendor |
| https://github.com/polyaxon/cli/blob/bfea04a0bf93886f69a3195954204d9d010b55aa/cli/polyaxon/_polyaxonfile/specs/sections.py | [email protected] | Source CodeVendor |
| https://github.com/polyaxon/polyaxon | [email protected] | ProductVendor |
| https://github.com/polyaxon/polyaxon/issues/1540 | [email protected] | ExploitIssue TrackingTechnical DescriptionVendor |
| https://www.vulncheck.com/advisories/polyaxon-through-2.16.4-server-side-template-injection-via-unsandboxed-jinja2-engine | [email protected] | AdvisoryBundleRemedy |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-1336 | Improper Neutralization of Special Elements Used in a Template Engine | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| Polyaxon | <= 2.16.4 (semver) |
CPE
Remediation
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Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Sep 15, 2026 | CVE Modified | CISA-ADP |
| Sep 15, 2026 | New CVE Received | [email protected] |