Bug 2524199 (CVE-2026-54757)

Summary: CVE-2026-54757 compliance-trestle: Trestle: Remote Code Execution via Server-Side Template Injection
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: high Docs Contact:
Priority: high    
Version: unspecifiedCC: akoudelk, lbragsta, wenshen
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in Trestle, a Python SDK and command-line tool for managing OSCAL compliance documents. This vulnerability involves server-side template injection (SSTI) due to the MDCleanInclude and MDSectionInclude Jinja2 tags improperly re-parsing untrusted Markdown content as template source code. An attacker who can control content rendered by Trestle, such as a crafted Markdown file, can inject a Jinja2 expression. This allows for remote code execution, enabling the attacker to run arbitrary operating system commands within the Trestle process.
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Description OSIDB Bzimport 2026-08-25 23:21:20 UTC 
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.