CVE-2026-102601

{"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"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-102601", "role": "CISA Coordinator", "options": [{"Exploitation": "poc"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-09-29T16:01:15.275868Z"}}}], "references": [{"url": "https://github.com/thephpleague/flysystem/security/advisories/GHSA-cxf4-7mrp-vvpr", "tags": ["exploit"]}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-09-29T16:01:37.568Z"}}], "cna": {"title": "Flysystem: WhitespacePathNormalizer's control-character (CorruptedPathDetected) check is bypassed by malformed UTF-8 in the path, affecting every adapter", "source": {"advisory": "GHSA-cxf4-7mrp-vvpr", "discovery": "UNKNOWN"}, "metrics": [{"cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 3.5, "attackVector": "NETWORK", "baseSeverity": "LOW", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N", "integrityImpact": "LOW", "userInteraction": "REQUIRED", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "LOW", "confidentialityImpact": "NONE"}}], "affected": [{"vendor": "thephpleague", "product": "flysystem", "versions": [{"status": "affected", "version": "< 3.35.3"}]}], "references": [{"url": "https://github.com/thephpleague/flysystem/security/advisories/GHSA-cxf4-7mrp-vvpr", "name": "https://github.com/thephpleague/flysystem/security/advisories/GHSA-cxf4-7mrp-vvpr", "tags": ["x_refsource_CONFIRM"]}, {"url": "https://github.com/thephpleague/flysystem/commit/ef4a9a557d769b5d472c403125716706a0d9cc77", "name": "https://github.com/thephpleague/flysystem/commit/ef4a9a557d769b5d472c403125716706a0d9cc77", "tags": ["x_refsource_MISC"]}, {"url": "https://github.com/thephpleague/flysystem/releases/tag/3.35.3", "name": "https://github.com/thephpleague/flysystem/releases/tag/3.35.3", "tags": ["x_refsource_MISC"]}], "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."}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-150", "description": "CWE-150: Improper Neutralization of Escape, Meta, or Control Sequences"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-09-29T15:26:42.044Z"}}}, "cveMetadata": {"cveId": "CVE-2026-102601", "state": "PUBLISHED", "dateUpdated": "2026-09-29T16:02:04.360Z", "dateReserved": "2026-09-29T14:18:02.920Z", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "datePublished": "2026-09-29T15:26:42.044Z", "assignerShortName": "GitHub_M"}, "dataVersion": "5.2"}

{"affected": [{"affectedData": [{"product": "flysystem", "vendor": "thephpleague", "versions": [{"status": "affected", "version": "< 3.35.3"}]}], "source": "security-advisories@github.com"}], "cveTags": [], "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."}], "id": "CVE-2026-102601", "lastModified": "2026-09-30T19:38:27.293", "metrics": {"cvssMetricV31": [{"cvssData": {"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"}, "exploitabilityScore": 2.1, "impactScore": 1.4, "source": "security-advisories@github.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-102601", "options": [{"exploitation": "poc"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-09-29T16:01:15.275868Z", "version": "2.0.3"}}]}, "published": "2026-09-29T16:17:06.343", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/thephpleague/flysystem/commit/ef4a9a557d769b5d472c403125716706a0d9cc77"}, {"source": "security-advisories@github.com", "url": "https://github.com/thephpleague/flysystem/releases/tag/3.35.3"}, {"source": "security-advisories@github.com", "url": "https://github.com/thephpleague/flysystem/security/advisories/GHSA-cxf4-7mrp-vvpr"}, {"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "url": "https://github.com/thephpleague/flysystem/security/advisories/GHSA-cxf4-7mrp-vvpr"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Awaiting Analysis", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-150"}], "source": "security-advisories@github.com", "type": "Primary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,3.35.3)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "flysystem", "source": "cna", "vendor": "thephpleague"}, "product": "flysystem", "vendor": "thephpleague"}], "created": "2026-09-29T17:30:17.064014+00:00", "updated": "2026-09-30T01:45:19.368051+00:00", "vendors": ["thephpleague", "thephpleague$PRODUCT$flysystem"]}