{"id":"CVE-2026-27710","summary":"NanaZip .NET Single-File Parser Integer Underflow Leads to Unbounded Allocation (DoS)","details":"NanaZip is an open source file archive. Starting in version 5.0.1252.0 and prior to versions 6.0.1638.0 and 6.5.1638.0, a denial-of-service vulnerability exists in NanaZip’s `.NET Single File Application` parser. A crafted bundle can force an integer underflow in header-size calculation and trigger an unbounded memory allocation attempt during archive open. Versions 6.0.1638.0 and 6.5.1638.0 fix the issue.","aliases":["GHSA-89qw-8p49-32wf"],"modified":"2026-08-12T03:51:38.357644604Z","published":"2026-02-25T23:43:28.219Z","database_specific":{"cwe_ids":["CWE-191"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/27xxx/CVE-2026-27710.json","cna_assigner":"GitHub_M"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/27xxx/CVE-2026-27710.json"},{"type":"ADVISORY","url":"https://github.com/M2Team/NanaZip/security/advisories/GHSA-89qw-8p49-32wf"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-27710"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/m2team/nanazip","events":[{"introduced":"401fa98a9aeaeef137d66303ccbb442366b46e51"},{"fixed":"91104bb04a5a811895143da1b9a4ad64c97dcaa3"}],"database_specific":{"source":"CPE_RANGE","cpe":"cpe:2.3:a:m2team:nanazip:*:*:*:*:*:*:*:*","extracted_events":[{"introduced":"5.0.1252.0"},{"fixed":"6.0.1638.0"}]}}],"versions":["6.0.1632.0","6.0.1630.0","6.0.1621.0","6.0.1461.0","5.1.1263.0","5.0.1263.0","5.1.1252.0","5.0.1252.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-27710.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N"}]}