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    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-40930",
        "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "state": "PUBLISHED",
        "assignerShortName": "GitHub_M",
        "dateReserved": "2026-04-15T20:40:15.518Z",
        "datePublished": "2026-06-04T14:34:51.843Z",
        "dateUpdated": "2026-06-04T16:37:38.286Z"
    },
    "containers": {
        "cna": {
            "title": "LIBPNG: Chunk smuggling in push-mode APNG parser via unconsumed chunk body",
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-436",
                            "lang": "en",
                            "description": "CWE-436: Interpretation Conflict",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "metrics": [
                {
                    "cvssV3_1": {
                        "attackComplexity": "LOW",
                        "attackVector": "NETWORK",
                        "availabilityImpact": "LOW",
                        "baseScore": 5.4,
                        "baseSeverity": "MEDIUM",
                        "confidentialityImpact": "NONE",
                        "integrityImpact": "LOW",
                        "privilegesRequired": "NONE",
                        "scope": "UNCHANGED",
                        "userInteraction": "REQUIRED",
                        "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:L",
                        "version": "3.1"
                    }
                }
            ],
            "references": [
                {
                    "name": "https://github.com/pnggroup/libpng/security/advisories/GHSA-c4v6-gxrq-6g2x",
                    "tags": [
                        "x_refsource_CONFIRM"
                    ],
                    "url": "https://github.com/pnggroup/libpng/security/advisories/GHSA-c4v6-gxrq-6g2x"
                },
                {
                    "name": "https://github.com/pnggroup/libpng/commit/faf06924688b62d7c1654b5ceddedbde66ffadb4",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/pnggroup/libpng/commit/faf06924688b62d7c1654b5ceddedbde66ffadb4"
                }
            ],
            "affected": [
                {
                    "vendor": "pnggroup",
                    "product": "libpng",
                    "versions": [
                        {
                            "version": "= 1.8.0",
                            "status": "affected"
                        }
                    ]
                },
                {
                    "vendor": "pnggroup",
                    "product": "libpng-apng",
                    "versions": [
                        {
                            "version": ">= 1.6.49, <= 1.6.57",
                            "status": "affected"
                        }
                    ]
                }
            ],
            "providerMetadata": {
                "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
                "shortName": "GitHub_M",
                "dateUpdated": "2026-06-04T14:34:51.843Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "LIBPNG is a reference library for use in applications that process PNG (Portable Network Graphics) raster image files. In version 1.8.0, three inter-frame chunk discard paths in the push-mode APNG parser clear the chunk-header flag without consuming the chunk body and CRC, allowing attacker-controlled bytes inside an ignored ancillary chunk to be reinterpreted as a fresh chunk header on the next call to `png_process_data`. Commit faf06924688b62d7c1654b5ceddedbde66ffadb4 fixes the issue."
                }
            ],
            "source": {
                "advisory": "GHSA-c4v6-gxrq-6g2x",
                "discovery": "UNKNOWN"
            }
        },
        "adp": [
            {
                "title": "CVE Program Container",
                "references": [
                    {
                        "url": "http://www.openwall.com/lists/oss-security/2026/05/15/21"
                    }
                ],
                "providerMetadata": {
                    "orgId": "af854a3a-2127-422b-91ae-364da2661108",
                    "shortName": "CVE",
                    "dateUpdated": "2026-06-04T15:05:19.991Z"
                }
            },
            {
                "metrics": [
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "timestamp": "2026-06-04T16:37:21.465127Z",
                                "id": "CVE-2026-40930",
                                "options": [
                                    {
                                        "Exploitation": "none"
                                    },
                                    {
                                        "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": "2026-06-04T16:37:38.286Z"
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    }
}