CVE-2026-54718

{"id": "CVE-2026-54718", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-54718", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "version": "2.0.3", "timestamp": "2026-08-31T18:17:05.218921Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.2, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "HIGH", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 1.2}]}, "affected": [{"source": "security-advisories@github.com", "affectedData": [{"vendor": "silverstripe", "product": "silverstripe-advancedworkflow", "versions": [{"status": "affected", "version": "< 6.4.5"}, {"status": "affected", "version": ">= 7.0.0, < 7.1.3"}, {"status": "affected", "version": ">= 7.2.0, < 7.2.1"}]}]}], "published": "2026-08-27T20:17:49.817", "references": [{"url": "https://github.com/silverstripe/silverstripe-advancedworkflow/commit/28d0b536491e5c68b1c445579bdd1ddc8beaf8bb", "source": "security-advisories@github.com"}, {"url": "https://github.com/silverstripe/silverstripe-advancedworkflow/commit/f170766af992ed2ed3e5f21d127d0d0d3129678b", "source": "security-advisories@github.com"}, {"url": "https://github.com/silverstripe/silverstripe-advancedworkflow/pull/629", "source": "security-advisories@github.com"}, {"url": "https://github.com/silverstripe/silverstripe-advancedworkflow/pull/630", "source": "security-advisories@github.com"}, {"url": "https://github.com/silverstripe/silverstripe-advancedworkflow/releases/tag/6.4.5", "source": "security-advisories@github.com"}, {"url": "https://github.com/silverstripe/silverstripe-advancedworkflow/releases/tag/7.1.3", "source": "security-advisories@github.com"}, {"url": "https://github.com/silverstripe/silverstripe-advancedworkflow/releases/tag/7.2.1", "source": "security-advisories@github.com"}, {"url": "https://github.com/silverstripe/silverstripe-advancedworkflow/security/advisories/GHSA-39mm-rwm3-29jp", "source": "security-advisories@github.com"}, {"url": "https://www.silverstripe.org/download/security-releases/cve-2026-54718", "source": "security-advisories@github.com"}], "vulnStatus": "Deferred", "weaknesses": [{"type": "Secondary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-1336"}]}], "descriptions": [{"lang": "en", "value": "Silverstripe Advanced Workflow is a highly configurable step-based workflow module. Prior to 6.4.5, 7.1.3, and 7.2.1, an attacker with permission to author the advanced workflow email template can place a specially crafted server-side template payload in NotifyUsersWorkflowAction.EmailTemplate. When NotifyUsersWorkflowAction renders the field through the Silverstripe template engine SSTemplateParser, the payload can cause PHP evaluation and arbitrary code execution on the server; the regression coverage is in tests/php/WorkflowEngineTest.php. This issue is fixed in versions 6.4.5, 7.1.3, and 7.2.1."}], "lastModified": "2026-09-09T21:09:13.080", "sourceIdentifier": "security-advisories@github.com"}