{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-54616",
        "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "state": "PUBLISHED",
        "assignerShortName": "GitHub_M",
        "dateReserved": "2026-06-15T20:07:02.184Z",
        "datePublished": "2026-08-20T16:11:54.192Z",
        "dateUpdated": "2026-08-20T19:52:07.850Z"
    },
    "containers": {
        "cna": {
            "title": "NanaZip: Heap out-of-bounds read in NanaZip SquashFS LZ4 decompressor via unchecked negative return value",
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-125",
                            "lang": "en",
                            "description": "CWE-125: Out-of-bounds Read",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "metrics": [
                {
                    "cvssV3_1": {
                        "attackComplexity": "LOW",
                        "attackVector": "NETWORK",
                        "availabilityImpact": "LOW",
                        "baseScore": 7.1,
                        "baseSeverity": "HIGH",
                        "confidentialityImpact": "HIGH",
                        "integrityImpact": "NONE",
                        "privilegesRequired": "NONE",
                        "scope": "UNCHANGED",
                        "userInteraction": "REQUIRED",
                        "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:L",
                        "version": "3.1"
                    }
                }
            ],
            "references": [
                {
                    "name": "https://github.com/M2Team/NanaZip/security/advisories/GHSA-95x5-qvvm-hmfp",
                    "tags": [
                        "x_refsource_CONFIRM"
                    ],
                    "url": "https://github.com/M2Team/NanaZip/security/advisories/GHSA-95x5-qvvm-hmfp"
                },
                {
                    "name": "https://github.com/M2Team/NanaZip/commit/733e8570d2ba96c3e52aab44f5fd886775d5952f",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/M2Team/NanaZip/commit/733e8570d2ba96c3e52aab44f5fd886775d5952f"
                },
                {
                    "name": "https://github.com/M2Team/NanaZip/commit/ce0322a1932e16a53e4a13e48bc61804c7826956",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/M2Team/NanaZip/commit/ce0322a1932e16a53e4a13e48bc61804c7826956"
                },
                {
                    "name": "https://github.com/M2Team/NanaZip/releases/tag/6.0.1698.0",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/M2Team/NanaZip/releases/tag/6.0.1698.0"
                },
                {
                    "name": "https://github.com/M2Team/NanaZip/releases/tag/6.5.1742.0",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/M2Team/NanaZip/releases/tag/6.5.1742.0"
                }
            ],
            "affected": [
                {
                    "vendor": "M2Team",
                    "product": "NanaZip",
                    "versions": [
                        {
                            "version": ">= 1.0.88.0, < 6.0.1698.0",
                            "status": "affected"
                        },
                        {
                            "version": ">= 6.5.1638.0, < 6.5.1742.0",
                            "status": "affected"
                        }
                    ]
                }
            ],
            "providerMetadata": {
                "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
                "shortName": "GitHub_M",
                "dateUpdated": "2026-08-20T16:11:54.192Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "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."
                }
            ],
            "source": {
                "advisory": "GHSA-95x5-qvvm-hmfp",
                "discovery": "UNKNOWN"
            }
        },
        "adp": [
            {
                "references": [
                    {
                        "url": "https://github.com/M2Team/NanaZip/security/advisories/GHSA-95x5-qvvm-hmfp",
                        "tags": [
                            "exploit"
                        ]
                    }
                ],
                "metrics": [
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "timestamp": "2026-08-20T19:52:01.141088Z",
                                "id": "CVE-2026-54616",
                                "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": "2026-08-20T19:52:07.850Z"
                }
            }
        ]
    }
}