Trestle has Server-Side Template Injection (SSTI) via Recursive Template Re-evaluation of Untrusted Data

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-54757
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-25 23:17:19 UTC
Updated2026-08-25 23:17:19 UTC
DescriptionCompliance-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.

Risk And Classification

Primary CVSS: v3.1 7.8 HIGH from [email protected]

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

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

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary7.8HIGHCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
3.1CNADECLARED7.8HIGHCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

CVSS v3.1 Breakdown

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

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Oscal-compass Compliance-trestle affected < 3.12.4 Not specified
CNA Oscal-compass Compliance-trestle affected >= 4.0.0, < 4.1.0 Not specified

References

ReferenceSourceLinkTags
github.com/oscal-compass/compliance-trestle/commit/5335ff873a2a68eb7de43... [email protected] github.com
github.com/oscal-compass/compliance-trestle/commit/0f82d19bd42f9cc0f1b3a... [email protected] github.com
github.com/oscal-compass/compliance-trestle/security/advisories/GHSA-jw3... [email protected] github.com
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