{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-59956",
        "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "state": "PUBLISHED",
        "assignerShortName": "GitHub_M",
        "dateReserved": "2026-07-07T18:49:15.607Z",
        "datePublished": "2026-09-18T15:33:22.599Z",
        "dateUpdated": "2026-09-18T17:41:48.491Z"
    },
    "containers": {
        "cna": {
            "title": "OpenImageIO: Heap-buffer-overread in IffInput::readimg() when ZBUFFER flag is set",
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-125",
                            "lang": "en",
                            "description": "CWE-125: Out-of-bounds Read",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "metrics": [
                {
                    "cvssV3_1": {
                        "attackComplexity": "LOW",
                        "attackVector": "LOCAL",
                        "availabilityImpact": "HIGH",
                        "baseScore": 6.1,
                        "baseSeverity": "MEDIUM",
                        "confidentialityImpact": "LOW",
                        "integrityImpact": "NONE",
                        "privilegesRequired": "NONE",
                        "scope": "UNCHANGED",
                        "userInteraction": "REQUIRED",
                        "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H",
                        "version": "3.1"
                    }
                }
            ],
            "references": [
                {
                    "name": "https://github.com/AcademySoftwareFoundation/OpenImageIO/security/advisories/GHSA-hjfv-gvxc-qgvh",
                    "tags": [
                        "x_refsource_CONFIRM"
                    ],
                    "url": "https://github.com/AcademySoftwareFoundation/OpenImageIO/security/advisories/GHSA-hjfv-gvxc-qgvh"
                },
                {
                    "name": "https://github.com/AcademySoftwareFoundation/OpenImageIO/pull/5251",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/AcademySoftwareFoundation/OpenImageIO/pull/5251"
                },
                {
                    "name": "https://github.com/AcademySoftwareFoundation/OpenImageIO/commit/f01bd16764b2a06f372899e3e302280a7f9c8c02",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/AcademySoftwareFoundation/OpenImageIO/commit/f01bd16764b2a06f372899e3e302280a7f9c8c02"
                },
                {
                    "name": "https://github.com/AcademySoftwareFoundation/OpenImageIO/releases/tag/v3.0.20.0",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/AcademySoftwareFoundation/OpenImageIO/releases/tag/v3.0.20.0"
                },
                {
                    "name": "https://github.com/AcademySoftwareFoundation/OpenImageIO/releases/tag/v3.1.15.0",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/AcademySoftwareFoundation/OpenImageIO/releases/tag/v3.1.15.0"
                }
            ],
            "affected": [
                {
                    "vendor": "AcademySoftwareFoundation",
                    "product": "OpenImageIO",
                    "versions": [
                        {
                            "version": "< 3.0.20.0",
                            "status": "affected"
                        },
                        {
                            "version": ">= 3.1.0.0, < 3.1.15.0",
                            "status": "affected"
                        },
                        {
                            "version": ">= 3.2.0.0-dev, < 3.2.0.3-beta1",
                            "status": "affected"
                        }
                    ]
                }
            ],
            "providerMetadata": {
                "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
                "shortName": "GitHub_M",
                "dateUpdated": "2026-09-18T15:33:22.599Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "OpenImageIO is a toolset for reading, writing, and manipulating image files of any image file format relevant to VFX / animation. Prior to 3.0.20.0, 3.1.15.0, and 3.2.0.3-beta1, An uncompressed 16-bit iff image with a z-buffer makes iffinput::readimg() allocate a temporary scanline from m_header.rgba_count but copy from it using m_header.pixel_bytes(), whose stride also includes z-buffer bytes. the oversized memcpy reads beyond the temporary heap buffer and copies adjacent memory into the output image, resulting in a crash or disclosure of adjacent heap data. The affected implementation is identified by src/iff.imageio/iffinput.cpp, IffInput::readimg(), m_header.rgba_count, and m_header.pixel_bytes(), which define the relevant source path, functions, state, and trigger. This issue is fixed in versions 3.0.20.0, 3.1.15.0, and 3.2.0.3-beta1."
                }
            ],
            "source": {
                "advisory": "GHSA-hjfv-gvxc-qgvh",
                "discovery": "UNKNOWN"
            }
        },
        "adp": [
            {
                "references": [
                    {
                        "url": "https://github.com/AcademySoftwareFoundation/OpenImageIO/security/advisories/GHSA-hjfv-gvxc-qgvh",
                        "tags": [
                            "exploit"
                        ]
                    }
                ],
                "metrics": [
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "timestamp": "2026-09-18T17:41:21.102766Z",
                                "id": "CVE-2026-59956",
                                "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": "2026-09-18T17:41:48.491Z"
                }
            }
        ]
    }
}