{"id":"CVE-2026-55782","state":"PUBLISHED","title":"NanaZip: Unbounded memory allocation (DoS) in NanaZip WebAssembly parser via attacker-controlled section/name length fields","description":"NanaZip is the 7-Zip derivative intended for the modern Windows experience. Prior to 6.5.1749.0, NanaZip's WebAssembly archive handler in NanaZip.Codecs.Archive.WebAssembly.cpp allocates buffers from attacker-controlled 32-bit section and custom-name length fields without validating them against the data present in the file. A tiny crafted module can force multi-gigabyte allocations during listing or extraction through NameSize, Information.Size, and std::string or vector allocation paths, causing memory exhaustion or process termination. This issue is fixed in version 6.5.1749.0.","publishedAt":"2026-07-10T16:46:38.842Z","updatedAt":"2026-07-14T02:00:57.604Z","severity":{"score":2.4,"label":"Low","version":"4.0","vector":"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","source":"GitHub_M"},"assigner":"GitHub_M","products":["M2Team NanaZip"],"affected":[{"vendor":"M2Team","product":"NanaZip","versions":[{"version":"< 6.5.1749.0","status":"affected"}]}],"references":["https://github.com/M2Team/NanaZip/security/advisories/GHSA-qxhc-2v6p-wm8m","https://github.com/M2Team/NanaZip/commit/1ce90f2d14a984476d0407a835273705607facf2","https://github.com/M2Team/NanaZip/commit/56aee89037947410dd5e66f3a087e0f290484bae","https://github.com/M2Team/NanaZip/commit/92b12a6e1eb0cf8e88fcc277aa7508ca1ff27db6","https://github.com/M2Team/NanaZip/releases/tag/6.5.1749.0"],"weaknesses":["CWE-400","CWE-789"],"ingestedAt":"2026-10-29T20:12:24.861Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/55xxx/CVE-2026-55782.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-55782","state":"PUBLISHED","datePublished":"2026-07-10T16:46:38.842Z","dateUpdated":"2026-07-14T02:00:57.604Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-06-17T14:40:28.379Z"},"containers":{"cna":{"title":"NanaZip: Unbounded memory allocation (DoS) in NanaZip WebAssembly parser via attacker-controlled section/name length fields","descriptions":[{"lang":"en","value":"NanaZip is the 7-Zip derivative intended for the modern Windows experience. Prior to 6.5.1749.0, NanaZip's WebAssembly archive handler in NanaZip.Codecs.Archive.WebAssembly.cpp allocates buffers from attacker-controlled 32-bit section and custom-name length fields without validating them against the data present in the file. A tiny crafted module can force multi-gigabyte allocations during listing or extraction through NameSize, Information.Size, and std::string or vector allocation paths, causing memory exhaustion or process termination. This issue is fixed in version 6.5.1749.0."}],"affected":[{"vendor":"M2Team","product":"NanaZip","versions":[{"version":"< 6.5.1749.0","status":"affected"}]}],"references":[{"url":"https://github.com/M2Team/NanaZip/security/advisories/GHSA-qxhc-2v6p-wm8m","name":"https://github.com/M2Team/NanaZip/security/advisories/GHSA-qxhc-2v6p-wm8m","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/M2Team/NanaZip/commit/1ce90f2d14a984476d0407a835273705607facf2","name":"https://github.com/M2Team/NanaZip/commit/1ce90f2d14a984476d0407a835273705607facf2","tags":["x_refsource_MISC"]},{"url":"https://github.com/M2Team/NanaZip/commit/56aee89037947410dd5e66f3a087e0f290484bae","name":"https://github.com/M2Team/NanaZip/commit/56aee89037947410dd5e66f3a087e0f290484bae","tags":["x_refsource_MISC"]},{"url":"https://github.com/M2Team/NanaZip/commit/92b12a6e1eb0cf8e88fcc277aa7508ca1ff27db6","name":"https://github.com/M2Team/NanaZip/commit/92b12a6e1eb0cf8e88fcc277aa7508ca1ff27db6","tags":["x_refsource_MISC"]},{"url":"https://github.com/M2Team/NanaZip/releases/tag/6.5.1749.0","name":"https://github.com/M2Team/NanaZip/releases/tag/6.5.1749.0","tags":["x_refsource_MISC"]}],"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"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-400","lang":"en","description":"CWE-400: Uncontrolled Resource Consumption","type":"CWE"}]},{"descriptions":[{"cweId":"CWE-789","lang":"en","description":"CWE-789: Memory Allocation with Excessive Size Value","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-07-10T16:46:38.842Z"},"source":{"advisory":"GHSA-qxhc-2v6p-wm8m","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","references":[{"url":"https://github.com/M2Team/NanaZip/security/advisories/GHSA-qxhc-2v6p-wm8m","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-07-14T02:00:08.437231Z","id":"CVE-2026-55782","options":[{"Exploitation":"poc"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-07-14T02:00:57.604Z"}}]}}}