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    "cveMetadata": {
        "cveId": "CVE-2026-23866",
        "assignerOrgId": "4fc57720-52fe-4431-a0fb-3d2c8747b827",
        "state": "PUBLISHED",
        "assignerShortName": "Meta",
        "dateReserved": "2026-01-16T19:49:26.309Z",
        "datePublished": "2026-05-01T16:02:03.304Z",
        "dateUpdated": "2026-05-01T17:42:09.286Z"
    },
    "containers": {
        "cna": {
            "affected": [
                {
                    "defaultStatus": "unaffected",
                    "product": "WhatsApp for Android",
                    "vendor": "Facebook",
                    "versions": [
                        {
                            "lessThan": "2.26.7.10",
                            "status": "affected",
                            "version": "2.25.8.0",
                            "versionType": "semver"
                        }
                    ]
                },
                {
                    "defaultStatus": "unaffected",
                    "product": "WhatsApp for iOS",
                    "vendor": "Facebook",
                    "versions": [
                        {
                            "lessThan": "2.26.15.72",
                            "status": "affected",
                            "version": "2.25.8.0",
                            "versionType": "semver"
                        }
                    ]
                }
            ],
            "dateAssigned": "2026-04-20T00:00:00.000Z",
            "descriptions": [
                {
                    "lang": "en",
                    "value": "Incomplete validation of AI rich response messages for Instagram Reels in WhatsApp for iOS v2.25.8.0 to v2.26.15.72 and WhatsApp for Android v2.25.8.0 to v2.26.7.10 could have allowed a user to trigger processing of media content from an arbitrary URL on another user’s device, including triggering OS-controlled custom URL scheme handlers. We have not seen evidence of exploitation in the wild."
                }
            ],
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "description": "Improper Verification of Source of a Communication Channel (CWE-940)",
                            "lang": "en"
                        }
                    ]
                }
            ],
            "providerMetadata": {
                "orgId": "4fc57720-52fe-4431-a0fb-3d2c8747b827",
                "shortName": "Meta",
                "dateUpdated": "2026-05-01T16:10:25.306Z"
            },
            "references": [
                {
                    "tags": [
                        "x_refsource_CONFIRM"
                    ],
                    "url": "https://www.facebook.com/security/advisories/cve-2026-23866"
                },
                {
                    "tags": [
                        "x_refsource_CONFIRM"
                    ],
                    "url": "https://www.whatsapp.com/security/advisories/2026"
                }
            ],
            "metrics": [
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                    "format": "CVSS",
                    "scenarios": [
                        {
                            "lang": "en",
                            "value": "GENERAL"
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                    ],
                    "cvssV3_1": {
                        "version": "3.1",
                        "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N/E:F/RL:O/RC:C",
                        "baseScore": 4.3,
                        "baseSeverity": "MEDIUM"
                    }
                }
            ]
        },
        "adp": [
            {
                "problemTypes": [
                    {
                        "descriptions": [
                            {
                                "type": "CWE",
                                "cweId": "CWE-940",
                                "lang": "en",
                                "description": "CWE-940 Improper Verification of Source of a Communication Channel"
                            }
                        ]
                    }
                ],
                "metrics": [
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "timestamp": "2026-05-01T17:41:43.060585Z",
                                "id": "CVE-2026-23866",
                                "options": [
                                    {
                                        "Exploitation": "none"
                                    },
                                    {
                                        "Automatable": "no"
                                    },
                                    {
                                        "Technical Impact": "partial"
                                    }
                                ],
                                "role": "CISA Coordinator",
                                "version": "2.0.3"
                            }
                        }
                    }
                ],
                "title": "CISA ADP Vulnrichment",
                "providerMetadata": {
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                    "shortName": "CISA-ADP",
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