vulnerability / NVI-00013152 / Revision 1
Trestle SSTI in Jinja2 include tags allows arbitrary code execution (Incomplete fix of CVE-2026-46439)
GitHub lists this reviewed advisory for compliance-trestle, compliance-trestle. Published version ranges and source prerequisites are shown below; this is not an inspection of a visitor’s application.
This report has not inspected your inventory, configuration, deployed build, reachability or evidence. A catalog listing and a severity score do not establish exposure or compromise.
01 / Meaning
Why it matters
Published affected context helps an owner decide what evidence to gather. This report has not examined your application.
7.8 high
GitHub source severity; exploitability and local consequence require separate evidence.
As of · GitHub Advisory Database
02 / Applicability
The affected context
Affected versions, configuration prerequisites and known exclusions are public. Confirm each one against the deployed service.
compliance-trestle
source listed< 3.12.4
Reporter: Cavan Loughran, Celvex Group Inc. Summary ------- The fix for CVE-2026-46439 (3.12.2 / 4.0.3) removed the recursive re-render loop in trestle/core/commands/author/jinja.py render_template, but the custom include tags in trestle/core/jinja/tags.py (MDSectionInclude, MDCleanInclude) still re-parse the CONTENT of an included markdown file as a Jinja2 template via Parser(self.environment, ).parse() in a plain (non-sandboxed) jinja2.Environment. Because the trestle markdown writers (ssp_io.py SSPMarkdownWriter, docs_control_writer.py DocsControlWriter) write OSCAL prose / component-description fields verbatim (the {{ -> [[ neutralization is applied to parameter tables only), attacker-controlled OSCAL data that flows into an included markdown file is interpreted as template code and can achieve arbitrary code execution on the runner. This is the same trust boundary and impact as CVE-2026-46439 via a sink the fix did not cover. Affected versions ----------------- 4.0.3 and earlier on this code path (the include tags predate and were untouched by the parent fix); the 3.12.x line likewise. Verified present in the fixed release 4.0.3 by direct source read. Technical d
compliance-trestle
source listed>= 4.0.0, < 4.1.0
Reporter: Cavan Loughran, Celvex Group Inc. Summary ------- The fix for CVE-2026-46439 (3.12.2 / 4.0.3) removed the recursive re-render loop in trestle/core/commands/author/jinja.py render_template, but the custom include tags in trestle/core/jinja/tags.py (MDSectionInclude, MDCleanInclude) still re-parse the CONTENT of an included markdown file as a Jinja2 template via Parser(self.environment, ).parse() in a plain (non-sandboxed) jinja2.Environment. Because the trestle markdown writers (ssp_io.py SSPMarkdownWriter, docs_control_writer.py DocsControlWriter) write OSCAL prose / component-description fields verbatim (the {{ -> [[ neutralization is applied to parameter tables only), attacker-controlled OSCAL data that flows into an included markdown file is interpreted as template code and can achieve arbitrary code execution on the runner. This is the same trust boundary and impact as CVE-2026-46439 via a sink the fix did not cover. Affected versions ----------------- 4.0.3 and earlier on this code path (the include tags predate and were untouched by the parent fix); the 3.12.x line likewise. Verified present in the fixed release 4.0.3 by direct source read. Technical d
03 / Response
What to do next
- investigate
Identify the exact component and deployed version, examine the linked publisher’s conditions, and retain evidence of any mitigation.
Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system. GitHub Advisory Database
A fixed release is not deployment evidence.
Check current vendor support and compatibility. After making a change, verify the deployed build and relevant runtime conditions. Keep the evidence, owner and time. An updated lockfile alone does not prove what is running.
04 / Limits
What this report cannot establish
- Customer inventory, deployment, reachability and exploitation have not been inspected.
05 / Provenance
Sources you can inspect
Each assertion retains its source. Mirrored records may repeat one underlying publisher; additional links are not independent corroboration.
- GHSA-mr95-65j8-9mxp ↗
GitHub Advisory Database · vendor advisory
Observed . GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.
Public revision history
Only published revisions appear here. Routine fetches do not create a material-change event.
- Revision 1 ·
First indexed by Null; source disclosure date is shown separately.