{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-107334", "assignerOrgId": "7d14cffa-0d7d-4270-9dc0-52cabd5a23a6", "state": "PUBLISHED", "assignerShortName": "icscert", "dateReserved": "2026-10-07T18:31:15.966Z", "datePublished": "2026-10-08T17:32:00.480Z", "dateUpdated": "2026-10-08T17:32:00.480Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "7d14cffa-0d7d-4270-9dc0-52cabd5a23a6", "shortName": "icscert", "dateUpdated": "2026-10-08T17:32:00.480Z"}, "title": "Incorrect Authorization in Malcolm", "datePublic": "2026-10-07T19:02:00.000Z", "problemTypes": [{"descriptions": [{"lang": "en", "cweId": "CWE-863", "description": "CWE-863 Incorrect Authorization", "type": "CWE"}]}], "affected": [{"vendor": "CISA", "product": "Malcolm", "versions": [{"status": "affected", "version": "0", "lessThanOrEqual": "26.07.1", "versionType": "custom"}, {"status": "unaffected", "version": "26.08.0"}], "defaultStatus": "unaffected"}], "descriptions": [{"lang": "en", "value": "Malcolm's nginx Lua role-based access control (RBAC) layer decides whether an authenticated user may reach a role-restricted path (e.g. /htadmin, /auth, /admin_login, /arkime/api/esadmin, NetBox, upload endpoints) by pattern-matching the raw, percent-encoded request URI. Nginx itself, however, selects which location block actually serves the request using the percent-decoded, normalized URI. Because the RBAC check never percent-decodes its input, an authenticated low-privilege user can request an admin-only path using percent-encoding (e.g. /%68tadmin.php) and have nginx route it to the restricted location while the Lua RBAC gate evaluating the un-decoded raw string finds no matching restriction and grants access.", "supportingMedia": [{"type": "text/html", "base64": false, "value": "Malcolm's nginx Lua role-based access control (RBAC) layer decides whether an authenticated user may reach a role-restricted path (e.g. <code>/htadmin</code>, <code>/auth</code>, <code>/admin_login</code>, <code>/arkime/api/esadmin</code>, NetBox, upload endpoints) by pattern-matching the <strong>raw, percent-encoded</strong> request URI. Nginx itself, however, selects which <code>location</code> block actually serves the request using the <strong>percent-decoded, normalized</strong> URI. Because the RBAC check never percent-decodes its input, an authenticated low-privilege user can request an admin-only path using percent-encoding (e.g. <code>/%68tadmin.php</code>) and have nginx route it to the restricted location while the Lua RBAC gate evaluating the un-decoded raw string finds no matching restriction and grants access."}]}], "references": [{"url": "https://github.com/cisagov/Malcolm/security/advisories/GHSA-jr6p-63pg-hr6g", "tags": ["government-resource"]}, {"url": "https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-280-01.json"}], "metrics": [{"format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}], "cvssV3_1": {"version": "3.1", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "availabilityImpact": "NONE", "baseSeverity": "MEDIUM", "baseScore": 5.4, "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N"}}], "solutions": [{"lang": "en", "value": "Update to version v26.08.0", "supportingMedia": [{"type": "text/html", "base64": false, "value": "Update to version v26.08.0"}]}], "credits": [{"lang": "en", "value": "Seth Grover", "type": "finder"}], "source": {"advisory": "ICSA-26-280-01", "discovery": "INTERNAL"}, "x_generator": {"engine": "Vulnogram 1.0.5"}}}}

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