CVE-2026-91851

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-91851", "assignerOrgId": "5a6e4751-2f3f-4070-9419-94fb35b644e8", "state": "PUBLISHED", "assignerShortName": "CIRCL", "dateReserved": "2026-09-15T08:49:59.734Z", "datePublished": "2026-09-15T08:50:01.513Z", "dateUpdated": "2026-09-15T13:29:55.108Z"}, "containers": {"cna": {"affected": [{"modules": ["DashboardsController"], "product": "MISP", "programFiles": ["app/Controller/DashboardsController.php"], "repo": "https://github.com/MISP/MISP", "vendor": "MISP", "versions": [{"lessThan": "2.5.46", "status": "affected", "version": "0", "versionType": "semver"}]}], "credits": [{"lang": "en", "type": "remediation developer", "value": "iglocska"}, {"lang": "en", "type": "remediation developer", "value": "Claude Opus 5 (1M context)"}], "descriptions": [{"lang": "en", "supportingMedia": [{"base64": false, "type": "text/html", "value": "<p></p><p>Affected versions of MISP incorrectly filter dashboard templates that are restricted to a specific permission flag.</p>\n<p><code>DashboardsController::listTemplates()</code> allowed a template when either:</p><p></p><div>\u2003-&nbsp;its <code>restrict_to_permission_flag</code> matched one of the current user\u2019s permission flags, or</div><div>\u2003-&nbsp;<code>restrict_to_permission_flag</code> equaled integer <code>0</code></div><div><br><code></code></div><p><code></code></p><p>However, <code>restrict_to_permission_flag</code> is a <code>varchar</code>. MySQL therefore performed numeric coercion when comparing the column against integer <code>0</code>. Strings such as <code>perm_site_admin</code> convert numerically to zero, making expressions such as <code>perm_site_admin = 0</code> evaluate true and causing the \u201cunrestricted\u201d branch to match permission-restricted templates as well.</p><p></p><p>Version affected: \u22642.5.45<br></p>"}], "value": "Affected versions of MISP incorrectly filter dashboard templates that are restricted to a specific permission flag.\n\n\nDashboardsController::listTemplates() allowed a template when either:\n\n\n\n\u2003-\u00a0its restrict_to_permission_flag matched one of the current user\u2019s permission flags, or\n\n\u2003-\u00a0restrict_to_permission_flag equaled integer 0\n\n\n\n\n\n\nHowever, restrict_to_permission_flag is a varchar. MySQL therefore performed numeric coercion when comparing the column against integer 0. Strings such as perm_site_admin convert numerically to zero, making expressions such as perm_site_admin = 0 evaluate true and causing the \u201cunrestricted\u201d branch to match permission-restricted templates as well.\n\n\n\nVersion affected: \u22642.5.45"}], "impacts": [{"capecId": "CAPEC-1", "descriptions": [{"lang": "en", "value": "CAPEC-1 Accessing Functionality Not Properly Constrained by ACLs"}]}], "metrics": [{"cvssV4_0": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "NONE", "attackVector": "NETWORK", "baseScore": 5.3, "baseSeverity": "MEDIUM", "privilegesRequired": "LOW", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N", "version": "4.0", "vulnAvailabilityImpact": "NONE", "vulnConfidentialityImpact": "LOW", "vulnIntegrityImpact": "NONE", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}]}], "problemTypes": [{"descriptions": [{"cweId": "CWE-863", "description": "CWE-863 Incorrect Authorization", "lang": "en", "type": "CWE"}]}, {"descriptions": [{"cweId": "CWE-697", "description": "CWE-697 Incorrect Comparison", "lang": "en", "type": "CWE"}]}], "providerMetadata": {"orgId": "5a6e4751-2f3f-4070-9419-94fb35b644e8", "shortName": "CIRCL", "dateUpdated": "2026-09-15T08:50:01.513Z"}, "references": [{"name": "Security patch", "tags": ["patch"], "url": "https://github.com/MISP/MISP/commit/245b8d63a"}], "solutions": [{"lang": "en", "supportingMedia": [{"base64": false, "type": "text/html", "value": "<p>The fix corrects the type mismatch in the permission flag comparison by replacing the integer literal 0 with the explicit string values '' and '0', which are the actual database values representing an unrestricted dashboard template. This ensures MySQL performs a proper string-to-string comparison, so only rows genuinely marked as unrestricted are returned, restoring the intended per-permission-level access control on dashboard templates.</p>"}], "value": "The fix corrects the type mismatch in the permission flag comparison by replacing the integer literal 0 with the explicit string values '' and '0', which are the actual database values representing an unrestricted dashboard template. This ensures MySQL performs a proper string-to-string comparison, so only rows genuinely marked as unrestricted are returned, restoring the intended per-permission-level access control on dashboard templates."}], "title": "MISP Dashboard Template ACL Bypass Due to VARCHAR-to-Integer Type Coercion in Permission Flag Comparison", "x_gcve": [{"extensions": {"bcp-05-x-01": {"ai_annotations": [{"ai_level": "generated", "description": "Draft vulnerability metadata was generated from a git-format patch using an Ollama-hosted language model. 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Strings such as <code>perm_site_admin</code> convert numerically to zero, making expressions such as <code>perm_site_admin = 0</code> evaluate true and causing the \u201cunrestricted\u201d branch to match permission-restricted templates as well.</p><p></p><p>Version affected: \u22642.5.45<br></p>", "base64": false}]}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-863", "description": "CWE-863 Incorrect Authorization"}]}, {"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-697", "description": "CWE-697 Incorrect Comparison"}]}], "providerMetadata": {"orgId": "5a6e4751-2f3f-4070-9419-94fb35b644e8", "shortName": "CIRCL", "dateUpdated": "2026-09-15T08:50:01.513Z"}}}, "cveMetadata": {"cveId": "CVE-2026-91851", "state": "PUBLISHED", "dateUpdated": "2026-09-15T13:29:55.108Z", "dateReserved": "2026-09-15T08:49:59.734Z", "assignerOrgId": "5a6e4751-2f3f-4070-9419-94fb35b644e8", "datePublished": "2026-09-15T08:50:01.513Z", "assignerShortName": "CIRCL"}, "dataVersion": "5.2"}

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{}

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