{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-102601", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-09-29T14:18:02.920Z", "datePublished": "2026-09-29T15:26:42.044Z", "dateUpdated": "2026-09-29T16:02:04.360Z"}, "containers": {"cna": {"title": "Flysystem: WhitespacePathNormalizer's control-character (CorruptedPathDetected) check is bypassed by malformed UTF-8 in the path, affecting every adapter", "problemTypes": [{"descriptions": [{"cweId": "CWE-150", "lang": "en", "description": "CWE-150: Improper Neutralization of Escape, Meta, or Control Sequences", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 3.5, "baseSeverity": "LOW", "confidentialityImpact": "NONE", "integrityImpact": "LOW", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N", "version": "3.1"}}], "references": [{"name": "https://github.com/thephpleague/flysystem/security/advisories/GHSA-cxf4-7mrp-vvpr", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/thephpleague/flysystem/security/advisories/GHSA-cxf4-7mrp-vvpr"}, {"name": "https://github.com/thephpleague/flysystem/commit/ef4a9a557d769b5d472c403125716706a0d9cc77", "tags": ["x_refsource_MISC"], "url": "https://github.com/thephpleague/flysystem/commit/ef4a9a557d769b5d472c403125716706a0d9cc77"}, {"name": "https://github.com/thephpleague/flysystem/releases/tag/3.35.3", "tags": ["x_refsource_MISC"], "url": "https://github.com/thephpleague/flysystem/releases/tag/3.35.3"}], "affected": [{"vendor": "thephpleague", "product": "flysystem", "versions": [{"version": "< 3.35.3", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-09-29T15:26:42.044Z"}, "descriptions": [{"lang": "en", "value": "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."}], "source": {"advisory": "GHSA-cxf4-7mrp-vvpr", "discovery": "UNKNOWN"}}, "adp": [{"references": [{"url": "https://github.com/thephpleague/flysystem/security/advisories/GHSA-cxf4-7mrp-vvpr", "tags": ["exploit"]}], "metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-09-29T16:01:15.275868Z", "id": "CVE-2026-102601", "options": [{"Exploitation": "poc"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-09-29T16:02:04.360Z"}}]}}

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