{"apiVersion":"1.0","identifier":"CVE-2026-54616","description":"NanaZip is the 7-Zip derivative intended for the modern Windows experience. From version 1.0.88.0 until stable version 6.0.1698.0 and preview version 6.5.1742.0, the Lz4Decode function in NanaZip.Core/SevenZip/CPP/7zip/Archive/SquashfsHandler.cpp rejects only a zero return from LZ4_decompress_safe even though malformed input produces a negative error value. The negative int is converted to the unsigned SizeT destLen and then truncated into outBufWasWrittenSize, causing ReadBlock to trust an attacker-inflated _cachedUnpackBlockSize. During fragment extraction, an attacker-controlled inode Offset can make memcpy read beyond the _cachedBlock heap allocation and place adjacent heap contents in the extracted file, or crash the process. This issue is fixed in stable version 6.0.1698.0 and preview version 6.5.1742.0.","publishedAt":"2026-08-20T17:18:18","lastModifiedAt":"2026-08-20T20:17:34","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-54616","cvssScore":7.1,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:L","epssProbability":0.00319,"riskScore":0.73,"affectedProduct":"NanaZip","affectedVersions":">=1.0.88.0,<6.0.1698.0","vulnerabilityType":"Critical software","operatingSystems":[],"links":{"self":"https://www.redsauce.net/api/cves/CVE-2026-54616","webPages":{"es":"https://www.redsauce.net/es/cves/CVE-2026-54616","en":"https://www.redsauce.net/en/cves/CVE-2026-54616","fr":"https://www.redsauce.net/fr/cves/CVE-2026-54616","pt":"https://www.redsauce.net/pt/cves/CVE-2026-54616","de":"https://www.redsauce.net/de/cves/CVE-2026-54616","sk":"https://www.redsauce.net/sk/cves/CVE-2026-54616","el":"https://www.redsauce.net/el/cves/CVE-2026-54616"},"source":"https://nvd.nist.gov/vuln/detail/CVE-2026-54616"}}