Compliance-trestle (Trestle) is a Python SDK and command-line tool for managing OSCAL compliance documents. In versions before 3.12.4 and versions 4.0.0 through 4.0.3, Trestle is vulnerable to server-side template injection that can lead to remote code execution. This occurs because the MDCleanInclude and MDSectionInclude Jinja2 tags re-parse untrusted Markdown content as template source code using a non-sandboxed jinja2.Environment. An attacker who controls content that Trestle renders, such as a crafted workspace Markdown file, a third-party SSP document, or a YAML lookup-table value, can inject a Jinja2 expression that traverses Python object internals to execute arbitrary operating system commands in the context of the Trestle process. This issue is fixed in versions 3.12.4 and 4.1.0.

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History

Wed, 26 Aug 2026 13:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Wed, 26 Aug 2026 01:30:00 +0000

Type Values Removed Values Added
First Time appeared Oscal-compass
Oscal-compass compliance-trestle
Vendors & Products Oscal-compass
Oscal-compass compliance-trestle

Tue, 25 Aug 2026 23:15:00 +0000

Type Values Removed Values Added
Description Compliance-trestle (Trestle) is a Python SDK and command-line tool for managing OSCAL compliance documents. In versions before 3.12.4 and versions 4.0.0 through 4.0.3, Trestle is vulnerable to server-side template injection that can lead to remote code execution. This occurs because the MDCleanInclude and MDSectionInclude Jinja2 tags re-parse untrusted Markdown content as template source code using a non-sandboxed jinja2.Environment. An attacker who controls content that Trestle renders, such as a crafted workspace Markdown file, a third-party SSP document, or a YAML lookup-table value, can inject a Jinja2 expression that traverses Python object internals to execute arbitrary operating system commands in the context of the Trestle process. This issue is fixed in versions 3.12.4 and 4.1.0.
Title Trestle has Server-Side Template Injection (SSTI) via Recursive Template Re-evaluation of Untrusted Data
Weaknesses CWE-94
References
Metrics cvssV3_1

{'score': 7.8, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-08-26T12:21:23.031Z

Reserved: 2026-06-15T23:12:41.965Z

Link: CVE-2026-54757

cve-icon Vulnrichment

Updated: 2026-08-26T12:20:50.152Z

cve-icon NVD

Status : Received

Published: 2026-08-25T23:17:19.277

Modified: 2026-08-26T13:19:16.497

Link: CVE-2026-54757

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-08-26T01:15:04Z

Weaknesses