{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-63638",
        "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "state": "PUBLISHED",
        "assignerShortName": "GitHub_M",
        "dateReserved": "2026-07-17T14:11:15.482Z",
        "datePublished": "2026-09-18T15:47:53.721Z",
        "dateUpdated": "2026-09-22T14:48:04.230Z"
    },
    "containers": {
        "cna": {
            "title": "OpenImageIO: Cineon invalid bit depth heap out-of-bounds write",
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-787",
                            "lang": "en",
                            "description": "CWE-787: Out-of-bounds Write",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "metrics": [
                {
                    "cvssV3_1": {
                        "attackComplexity": "LOW",
                        "attackVector": "NETWORK",
                        "availabilityImpact": "HIGH",
                        "baseScore": 8.3,
                        "baseSeverity": "HIGH",
                        "confidentialityImpact": "LOW",
                        "integrityImpact": "HIGH",
                        "privilegesRequired": "NONE",
                        "scope": "UNCHANGED",
                        "userInteraction": "REQUIRED",
                        "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:H/A:H",
                        "version": "3.1"
                    }
                }
            ],
            "references": [
                {
                    "name": "https://github.com/AcademySoftwareFoundation/OpenImageIO/security/advisories/GHSA-9hxv-jvgr-3x8g",
                    "tags": [
                        "x_refsource_CONFIRM"
                    ],
                    "url": "https://github.com/AcademySoftwareFoundation/OpenImageIO/security/advisories/GHSA-9hxv-jvgr-3x8g"
                },
                {
                    "name": "https://github.com/AcademySoftwareFoundation/OpenImageIO/pull/5283",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/AcademySoftwareFoundation/OpenImageIO/pull/5283"
                },
                {
                    "name": "https://github.com/AcademySoftwareFoundation/OpenImageIO/commit/6f2b2e85b3b3933ccc5a46303d5535f99bfa39fb",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/AcademySoftwareFoundation/OpenImageIO/commit/6f2b2e85b3b3933ccc5a46303d5535f99bfa39fb"
                },
                {
                    "name": "https://github.com/AcademySoftwareFoundation/OpenImageIO/releases/tag/v3.0.21.0",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/AcademySoftwareFoundation/OpenImageIO/releases/tag/v3.0.21.0"
                },
                {
                    "name": "https://github.com/AcademySoftwareFoundation/OpenImageIO/releases/tag/v3.1.16.0",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/AcademySoftwareFoundation/OpenImageIO/releases/tag/v3.1.16.0"
                }
            ],
            "affected": [
                {
                    "vendor": "AcademySoftwareFoundation",
                    "product": "OpenImageIO",
                    "versions": [
                        {
                            "version": "< 3.0.21.0",
                            "status": "affected"
                        },
                        {
                            "version": ">= 3.1.0.0, < 3.1.16.0",
                            "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": "2026-09-18T15:47:53.721Z"
            },
            "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 3.0.21.0, 3.1.16.0, and 3.2.0.3-beta1, A crafted cineon image can declare unsupported component bit depth 26. cineoninput::open() maps it to a 32-bit imagespec, but libcineon maps the unsupported depth to an 8-byte value, so cineoninput::read_native_scanline() causes attacker-controlled data to be written beyond the 4-byte-per-pixel caller buffer, resulting in a heap out-of-bounds write and memory corruption. The affected implementation is identified by src/cineon.imageio/cineoninput.cpp, CineonInput::open(), CineonInput::read_native_scanline(), ComponentDataSize(), bit depth 26, and ImageSpec, which define the relevant source path, functions, state, and trigger. This issue is fixed in versions 3.0.21.0, 3.1.16.0, and 3.2.0.3-beta1."
                }
            ],
            "source": {
                "advisory": "GHSA-9hxv-jvgr-3x8g",
                "discovery": "UNKNOWN"
            }
        },
        "adp": [
            {
                "references": [
                    {
                        "url": "https://github.com/AcademySoftwareFoundation/OpenImageIO/security/advisories/GHSA-9hxv-jvgr-3x8g",
                        "tags": [
                            "exploit"
                        ]
                    }
                ],
                "metrics": [
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "timestamp": "2026-09-22T14:47:37.944039Z",
                                "id": "CVE-2026-63638",
                                "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": "2026-09-22T14:48:04.230Z"
                }
            }
        ]
    }
}