{"id":"CVE-2026-26067","state":"PUBLISHED","title":"October: Safe Mode Bypass via CSS Preprocessor Compilers","description":"October is a Content Management System (CMS) and web platform. Prior to 3.7.14 and 4.1.10, a server-side information disclosure vulnerability was identified in the handling of CSS preprocessor files. Backend users with Editor permissions could craft .less, .sass, or .scss files that leverage the compiler's import functionality to read arbitrary files from the server. This worked even with cms.safe_mode enabled. This vulnerability is fixed in 3.7.14 and 4.1.10.","publishedAt":"2026-04-21T16:16:03.293Z","updatedAt":"2026-04-21T17:35:19.882Z","severity":{"score":4.9,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N","source":"GitHub_M"},"assigner":"GitHub_M","products":["octobercms october"],"affected":[{"vendor":"octobercms","product":"october","versions":[{"version":">= 4.0.0, < 4.1.10","status":"affected"},{"version":"< 3.7.14","status":"affected"}]}],"references":["https://github.com/octobercms/october/security/advisories/GHSA-3888-q23f-x7qh"],"weaknesses":["CWE-863","CWE-184"],"ingestedAt":"2026-10-29T20:11:21.040Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/26xxx/CVE-2026-26067.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-26067","state":"PUBLISHED","datePublished":"2026-04-21T16:16:03.293Z","dateUpdated":"2026-04-21T17:35:19.882Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-02-10T18:01:31.900Z"},"containers":{"cna":{"title":"October: Safe Mode Bypass via CSS Preprocessor Compilers","descriptions":[{"lang":"en","value":"October is a Content Management System (CMS) and web platform. Prior to 3.7.14 and 4.1.10, a server-side information disclosure vulnerability was identified in the handling of CSS preprocessor files. Backend users with Editor permissions could craft .less, .sass, or .scss files that leverage the compiler's import functionality to read arbitrary files from the server. This worked even with cms.safe_mode enabled. This vulnerability is fixed in 3.7.14 and 4.1.10."}],"affected":[{"vendor":"octobercms","product":"october","versions":[{"version":">= 4.0.0, < 4.1.10","status":"affected"},{"version":"< 3.7.14","status":"affected"}]}],"references":[{"url":"https://github.com/octobercms/october/security/advisories/GHSA-3888-q23f-x7qh","name":"https://github.com/octobercms/october/security/advisories/GHSA-3888-q23f-x7qh","tags":["x_refsource_CONFIRM"]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":4.9,"baseSeverity":"MEDIUM","confidentialityImpact":"HIGH","integrityImpact":"NONE","privilegesRequired":"HIGH","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-863","lang":"en","description":"CWE-863: Incorrect Authorization","type":"CWE"}]},{"descriptions":[{"cweId":"CWE-184","lang":"en","description":"CWE-184: Incomplete List of Disallowed Inputs","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-04-21T16:16:03.293Z"},"source":{"advisory":"GHSA-3888-q23f-x7qh","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-04-21T17:35:10.591022Z","id":"CVE-2026-26067","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-04-21T17:35:19.882Z"}}]}}}