{"id":"CVE-2026-102601","revision":"db92e410cb874acd95d3bb7e0d6c76df","records":[{"revision":"db92e410cb874acd95d3bb7e0d6c76df","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-102601","aliases":[],"title":"Flysystem: WhitespacePathNormalizer's control-character (CorruptedPathDetected) check is bypassed by malformed UTF-8 in the path, affecting every adapter","description":"Flysystem is an open source file storage library for PHP. Prior to 3.35.3, the default WhitespacePathNormalizer in src/WhitespacePathNormalizer.php used by Filesystem across adapters calls preg_match with the u modifier and treats both false and 0 as falsy. A path containing malformed UTF-8 causes PCRE to return false, so paths that also contain control characters bypass CorruptedPathDetected::forPath() in normalizePath(). Filesystem::write() can store such names and Filesystem::listContents() can return the raw ANSI escape sequences, allowing hidden or spoofed terminal file listings when an administrator displays them. This issue is fixed in version 3.35.3.","state":0,"publishedAt":"2026-09-29T15:26:42.044+00:00","modifiedAt":"2026-09-29T16:02:04.36+00:00","affected":[{"ecosystem":"Vendor product","name":"flysystem","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"thephpleague\",\n                    \"product\": \"flysystem\",\n                    \"versions\": [\n                        {\n                            \"version\": \"< 3.35.3\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N","score":3.5,"severity":"LOW"}],"references":["https://github.com/thephpleague/flysystem/security/advisories/GHSA-cxf4-7mrp-vvpr","https://github.com/thephpleague/flysystem/commit/ef4a9a557d769b5d472c403125716706a0d9cc77","https://github.com/thephpleague/flysystem/releases/tag/3.35.3"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-102601","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-102601","identifiers":["CVE-2026-102601"]},"retained":false,"historicalAffected":[]}],"coverage":[]}