FKIE_CVE-2026-23866

Vulnerability from fkie_nvd - Published: 2026-05-01 16:16 - Updated: 2026-05-11 20:00
Severity ?
4.3 (Medium) - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Summary
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.
References
cve-assign@fb.comhttps://www.facebook.com/security/advisories/cve-2026-23866Third Party Advisory
cve-assign@fb.comhttps://www.whatsapp.com/security/advisories/2026Vendor Advisory
Impacted products
Vendor Product Version
whatsapp whatsapp *
whatsapp whatsapp *
To clipboard 

{
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:whatsapp:whatsapp:*:*:*:*:*:android:*:*",
              "matchCriteriaId": "A9F5775D-2CBD-427C-94CD-D01C11559B06",
              "versionEndIncluding": "2.26.7.10",
              "versionStartIncluding": "2.25.8.0",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:whatsapp:whatsapp:*:*:*:*:*:iphone_os:*:*",
              "matchCriteriaId": "9C83C05F-A88D-48B7-8DE8-5B8CBD9FC6B9",
              "versionEndIncluding": "2.26.15.72",
              "versionStartIncluding": "2.25.8.0",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "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\u2019s device, including triggering OS-controlled custom URL scheme handlers. We have not seen evidence of exploitation in the wild."
    }
  ],
  "id": "CVE-2026-23866",
  "lastModified": "2026-05-11T20:00:28.507",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 4.3,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "LOW",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 1.4,
        "source": "cve-assign@fb.com",
        "type": "Secondary"
      }
    ]
  },
  "published": "2026-05-01T16:16:29.980",
  "references": [
    {
      "source": "cve-assign@fb.com",
      "tags": [
        "Third Party Advisory"
      ],
      "url": "https://www.facebook.com/security/advisories/cve-2026-23866"
    },
    {
      "source": "cve-assign@fb.com",
      "tags": [
        "Vendor Advisory"
      ],
      "url": "https://www.whatsapp.com/security/advisories/2026"
    }
  ],
  "sourceIdentifier": "cve-assign@fb.com",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-940"
        }
      ],
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "type": "Secondary"
    }
  ]
}


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