{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-96642",
        "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "state": "PUBLISHED",
        "assignerShortName": "GitHub_M",
        "dateReserved": "2026-09-23T14:35:50.130Z",
        "datePublished": "2026-10-21T20:49:56.989Z",
        "dateUpdated": "2026-10-21T20:49:56.989Z"
    },
    "containers": {
        "cna": {
            "title": "Pillow: TarIO negative size field causes infinite CPU-spin loop",
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-835",
                            "lang": "en",
                            "description": "CWE-835: Loop with Unreachable Exit Condition ('Infinite Loop')",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "metrics": [
                {
                    "cvssV4_0": {
                        "attackVector": "NETWORK",
                        "attackComplexity": "LOW",
                        "attackRequirements": "NONE",
                        "privilegesRequired": "NONE",
                        "userInteraction": "PASSIVE",
                        "vulnConfidentialityImpact": "NONE",
                        "vulnIntegrityImpact": "NONE",
                        "vulnAvailabilityImpact": "HIGH",
                        "subConfidentialityImpact": "NONE",
                        "subIntegrityImpact": "NONE",
                        "subAvailabilityImpact": "NONE",
                        "baseScore": 7.1,
                        "baseSeverity": "HIGH",
                        "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
                        "version": "4.0"
                    }
                }
            ],
            "references": [
                {
                    "name": "https://github.com/python-pillow/Pillow/security/advisories/GHSA-3j72-p6qg-6xp7",
                    "tags": [
                        "x_refsource_CONFIRM"
                    ],
                    "url": "https://github.com/python-pillow/Pillow/security/advisories/GHSA-3j72-p6qg-6xp7"
                },
                {
                    "name": "https://github.com/python-pillow/Pillow/pull/10012",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/python-pillow/Pillow/pull/10012"
                },
                {
                    "name": "https://github.com/python-pillow/Pillow/commit/19b695fdcc5eddc37374e2b1645fc4185edaf71d",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/python-pillow/Pillow/commit/19b695fdcc5eddc37374e2b1645fc4185edaf71d"
                },
                {
                    "name": "https://github.com/python-pillow/Pillow/releases/tag/13.0.0",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/python-pillow/Pillow/releases/tag/13.0.0"
                }
            ],
            "affected": [
                {
                    "vendor": "python-pillow",
                    "product": "Pillow",
                    "versions": [
                        {
                            "version": "< 13.0.0",
                            "status": "affected"
                        }
                    ]
                }
            ],
            "providerMetadata": {
                "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
                "shortName": "GitHub_M",
                "dateUpdated": "2026-10-21T20:49:56.989Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "Pillow is a Python imaging library. Prior to 13.0.0, the TarIO initializer in src/PIL/TarIO.py accepts a negative octal member size and computes a backward seek that returns to the same 512-byte header. When the requested member name does not match, the parser repeatedly reads that header, consumes a full CPU core, and never returns. TarIO is reached only when an application directly uses PIL.TarIO.TarIO rather than the default Image.open() path. This issue is fixed in version 13.0.0."
                }
            ],
            "source": {
                "advisory": "GHSA-3j72-p6qg-6xp7",
                "discovery": "UNKNOWN"
            }
        }
    }
}