CVE-2026-57170

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{"affected": [{"affectedData": [{"product": "compliance-trestle", "vendor": "oscal-compass", "versions": [{"status": "affected", "version": "< 3.12.4"}, {"status": "affected", "version": ">= 4.0.0, < 4.1.0"}]}], "source": "security-advisories@github.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Compliance-trestle (Trestle) is a Python SDK and command-line tool for managing OSCAL compliance documents. In versions prior to 3.12.4 and 4.0.0 through 4.0.3, the custom Jinja2 include tags mdsection_include and md_clean_include re-parse the content of an included Markdown file as Jinja2 template code in a non-sandboxed environment, allowing server-side template injection that can lead to arbitrary code execution. The MDSectionInclude and MDCleanInclude tags in Trestle/core/jinja/tags.py pass included file content to Parser(self.environment, ...).parse(), splicing it into the host template's compilation, and the environment is a plain jinja2.Environment rather than a SandboxedEnvironment, so any expressions in the file are evaluated with full access to the usual SSTI gadget chain. Because Trestle's Markdown writers emit OSCAL prose and component-description fields verbatim, applying delimiter neutralization only to parameter tables, attacker-controlled OSCAL data such as a control statement, part prose, or component description containing Jinja2 syntax flows into an included Markdown file and is executed when the include tag re-parses it. This issue is fixed in version 4.1.0."}], "id": "CVE-2026-57170", "lastModified": "2026-09-09T21:09:13.080", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "security-advisories@github.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-57170", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-08-28T22:41:23.469103Z", "version": "2.0.3"}}]}, "published": "2026-08-26T05:18:11.763", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/oscal-compass/compliance-trestle/commit/0f82d19bd42f9cc0f1b3acd7fc3f6dafe3b6ae10"}, {"source": "security-advisories@github.com", "url": "https://github.com/oscal-compass/compliance-trestle/commit/5335ff873a2a68eb7de43df029bea09cadff22fd"}, {"source": "security-advisories@github.com", "url": "https://github.com/oscal-compass/compliance-trestle/security/advisories/GHSA-mr95-65j8-9mxp"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-94"}, {"lang": "en", "value": "CWE-1336"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{"bugzilla": {"description": "compliance-trestle: Trestle: Arbitrary code execution via Server-Side Template Injection", "id": "2524207", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2524207"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.8", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "status": "draft"}, "cwe": "CWE-917", "details": ["Compliance-trestle (Trestle) is a Python SDK and command-line tool for managing OSCAL compliance documents. In versions prior to 3.12.4 and 4.0.0 through 4.0.3, the custom Jinja2 include tags mdsection_include and md_clean_include re-parse the content of an included Markdown file as Jinja2 template code in a non-sandboxed environment, allowing server-side template injection that can lead to arbitrary code execution. The MDSectionInclude and MDCleanInclude tags in Trestle/core/jinja/tags.py pass included file content to Parser(self.environment, ...).parse(), splicing it into the host template's compilation, and the environment is a plain jinja2.Environment rather than a SandboxedEnvironment, so any expressions in the file are evaluated with full access to the usual SSTI gadget chain. Because Trestle's Markdown writers emit OSCAL prose and component-description fields verbatim, applying delimiter neutralization only to parameter tables, attacker-controlled OSCAL data such as a control statement, part prose, or component description containing Jinja2 syntax flows into an included Markdown file and is executed when the include tag re-parses it. This issue is fixed in version 4.1.0.", "A flaw was found in compliance-trestle. The custom Jinja2 include tags, `mdsection_include` and `md_clean_include`, incorrectly re-parse the content of included Markdown files as Jinja2 template code in a non-sandboxed environment. This vulnerability, known as Server-Side Template Injection (SSTI), allows an attacker to embed malicious Jinja2 syntax within OSCAL data. When processed, this malicious code can be executed, leading to arbitrary code execution."], "name": "CVE-2026-57170", "package_state": [{"cpe": "cpe:/a:redhat:openshift_file_integrity_operator:1", "fix_state": "Affected", "package_name": "compliance/openshift-compliance-content-rhel8", "product_name": "File Integrity Operator"}, {"cpe": "cpe:/a:redhat:hummingbird:1", "fix_state": "Not affected", "package_name": "scap-security-guide", "product_name": "Red Hat Hardened Images"}], "public_date": "2026-08-25T23:18:29Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-57170\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-57170\nhttps://github.com/oscal-compass/compliance-trestle/commit/0f82d19bd42f9cc0f1b3acd7fc3f6dafe3b6ae10\nhttps://github.com/oscal-compass/compliance-trestle/commit/5335ff873a2a68eb7de43df029bea09cadff22fd\nhttps://github.com/oscal-compass/compliance-trestle/security/advisories/GHSA-mr95-65j8-9mxp"], "threat_severity": "Important"}

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