{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-55783", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-06-17T14:40:28.379Z", "datePublished": "2026-07-10T16:48:29.959Z", "dateUpdated": "2026-07-10T18:38:45.230Z"}, "containers": {"cna": {"title": "NanaZip: NULL pointer dereference in Extract() of all seven NanaZip custom archive handlers when extracting/testing the whole archive", "problemTypes": [{"descriptions": [{"cweId": "CWE-476", "lang": "en", "description": "CWE-476: NULL Pointer Dereference", "type": "CWE"}]}], "metrics": [{"cvssV4_0": {"attackVector": "LOCAL", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "LOW", "userInteraction": "PASSIVE", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "NONE", "vulnAvailabilityImpact": "LOW", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "baseScore": 2.4, "baseSeverity": "LOW", "vectorString": "CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N", "version": "4.0"}}], "references": [{"name": "https://github.com/M2Team/NanaZip/security/advisories/GHSA-q67r-9cfh-xc29", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/M2Team/NanaZip/security/advisories/GHSA-q67r-9cfh-xc29"}, {"name": "https://github.com/M2Team/NanaZip/commit/5d74d90b737ac7096e5d944a5a3070c5c6a8f894", "tags": ["x_refsource_MISC"], "url": "https://github.com/M2Team/NanaZip/commit/5d74d90b737ac7096e5d944a5a3070c5c6a8f894"}, {"name": "https://github.com/M2Team/NanaZip/releases/tag/6.5.1749.0", "tags": ["x_refsource_MISC"], "url": "https://github.com/M2Team/NanaZip/releases/tag/6.5.1749.0"}], "affected": [{"vendor": "M2Team", "product": "NanaZip", "versions": [{"version": "< 6.5.1749.0", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-07-10T16:48:29.959Z"}, "descriptions": [{"lang": "en", "value": "NanaZip is the 7-Zip derivative intended for the modern Windows experience. Prior to 6.5.1749.0, NanaZip's seven in-house IInArchive handlers in NanaZip.Codecs unconditionally dereference the caller-supplied Indices array inside Extract when the archive engine signals extract everything by passing Indices as NULL and NumItems as 0xFFFFFFFF. This causes a NULL pointer dereference in the standard Test archive or Extract all code path for WebAssembly, ElectronAsar, Zealfs, Romfs, Ufs, Littlefs, and DotNetSingleFile archives, resulting in a process crash. This issue is fixed in version 6.5.1749.0."}], "source": {"advisory": "GHSA-q67r-9cfh-xc29", "discovery": "UNKNOWN"}}, "adp": [{"references": [{"url": "https://github.com/M2Team/NanaZip/security/advisories/GHSA-q67r-9cfh-xc29", "tags": ["exploit"]}], "metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-07-10T18:38:42.233516Z", "id": "CVE-2026-55783", "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": "2026-07-10T18:38:45.230Z"}}]}}

{}

{}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[0,6.5.1749.0)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "NanaZip", "source": "cna", "vendor": "M2Team"}, "product": "nanazip", "vendor": "m2team"}], "created": "2026-07-10T18:30:16.429189+00:00", "updated": "2026-07-10T18:30:16.429214+00:00", "vendors": ["m2team", "m2team$PRODUCT$nanazip"]}