{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-3949",
        "assignerOrgId": "1af790b2-7ee1-4545-860a-a788eba489b5",
        "state": "PUBLISHED",
        "assignerShortName": "VulDB",
        "dateReserved": "2026-03-11T11:59:39.639Z",
        "datePublished": "2026-03-11T18:32:09.358Z",
        "dateUpdated": "2026-03-11T19:38:00.870Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "1af790b2-7ee1-4545-860a-a788eba489b5",
                "shortName": "VulDB",
                "dateUpdated": "2026-03-11T18:32:09.358Z"
            },
            "title": "strukturag libheif HEIF File decoder_vvdec.cc vvdec_push_data2 out-of-bounds",
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "type": "CWE",
                            "cweId": "CWE-125",
                            "lang": "en",
                            "description": "Out-of-Bounds Read"
                        }
                    ]
                },
                {
                    "descriptions": [
                        {
                            "type": "CWE",
                            "cweId": "CWE-119",
                            "lang": "en",
                            "description": "Memory Corruption"
                        }
                    ]
                }
            ],
            "affected": [
                {
                    "vendor": "strukturag",
                    "product": "libheif",
                    "versions": [
                        {
                            "version": "1.21.0",
                            "status": "affected"
                        },
                        {
                            "version": "1.21.1",
                            "status": "affected"
                        },
                        {
                            "version": "1.21.2",
                            "status": "affected"
                        }
                    ],
                    "modules": [
                        "HEIF File Parser"
                    ]
                }
            ],
            "descriptions": [
                {
                    "lang": "en",
                    "value": "A vulnerability was determined in strukturag libheif up to 1.21.2. This affects the function vvdec_push_data2 of the file libheif/plugins/decoder_vvdec.cc of the component HEIF File Parser. Executing a manipulation of the argument size can lead to out-of-bounds read. The attack needs to be launched locally. The exploit has been publicly disclosed and may be utilized. This patch is called b97c8b5f198b27f375127cd597a35f2113544d03. It is advisable to implement a patch to correct this issue."
                }
            ],
            "metrics": [
                {
                    "cvssV4_0": {
                        "version": "4.0",
                        "baseScore": 4.8,
                        "vectorString": "CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P",
                        "baseSeverity": "MEDIUM"
                    }
                },
                {
                    "cvssV3_1": {
                        "version": "3.1",
                        "baseScore": 3.3,
                        "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:O/RC:C",
                        "baseSeverity": "LOW"
                    }
                },
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                    "cvssV3_0": {
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                {
                    "cvssV2_0": {
                        "version": "2.0",
                        "baseScore": 1.7,
                        "vectorString": "AV:L/AC:L/Au:S/C:N/I:N/A:P/E:POC/RL:OF/RC:C"
                    }
                }
            ],
            "timeline": [
                {
                    "time": "2026-03-11T00:00:00.000Z",
                    "lang": "en",
                    "value": "Advisory disclosed"
                },
                {
                    "time": "2026-03-11T01:00:00.000Z",
                    "lang": "en",
                    "value": "VulDB entry created"
                },
                {
                    "time": "2026-03-11T13:04:43.000Z",
                    "lang": "en",
                    "value": "VulDB entry last update"
                }
            ],
            "credits": [
                {
                    "lang": "en",
                    "value": "biniam (VulDB User)",
                    "type": "reporter"
                }
            ],
            "references": [
                {
                    "url": "https://vuldb.com/?id.350381",
                    "name": "VDB-350381 | strukturag libheif HEIF File decoder_vvdec.cc vvdec_push_data2 out-of-bounds",
                    "tags": [
                        "vdb-entry",
                        "technical-description"
                    ]
                },
                {
                    "url": "https://vuldb.com/?ctiid.350381",
                    "name": "VDB-350381 | CTI Indicators (IOB, IOC, IOA)",
                    "tags": [
                        "signature",
                        "permissions-required"
                    ]
                },
                {
                    "url": "https://vuldb.com/?submit.765979",
                    "name": "Submit #765979 | strukturag libheif 1.21.2 Out-of-Bounds Read",
                    "tags": [
                        "third-party-advisory"
                    ]
                },
                {
                    "url": "https://github.com/strukturag/libheif/issues/1712",
                    "tags": [
                        "issue-tracking"
                    ]
                },
                {
                    "url": "https://github.com/strukturag/libheif/issues/1712#issuecomment-3947938531",
                    "tags": [
                        "issue-tracking"
                    ]
                },
                {
                    "url": "https://github.com/biniamf/pocs/tree/main/libheif_vvdec",
                    "tags": [
                        "exploit"
                    ]
                },
                {
                    "url": "https://github.com/strukturag/libheif/commit/b97c8b5f198b27f375127cd597a35f2113544d03",
                    "tags": [
                        "patch"
                    ]
                },
                {
                    "url": "https://github.com/strukturag/libheif/",
                    "tags": [
                        "product"
                    ]
                }
            ],
            "tags": [
                "x_open-source"
            ]
        },
        "adp": [
            {
                "metrics": [
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "timestamp": "2026-03-11T19:37:14.390113Z",
                                "id": "CVE-2026-3949",
                                "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": "2026-03-11T19:38:00.870Z"
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        ]
    }
}