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CVE-2026-23866

Quick assessment

Affected
Facebook WhatsApp for Android
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Facebook WhatsApp是美国Facebook公司的一套基于Android平台的、利用网络传送短信的移动应用程序。该应用程序通过智能手机中的联络人信息，查找使用该软件的联络人传送文字、图片等。 Facebook WhatsApp v2.25.8.0至v2.26.15.72版本和WhatsApp for Android v2.25.8.0至v2.26.7.10版本存在安全漏洞，该漏洞源于对Instagram Reels的AI丰富响应消息验证不完整，可能导致用户触发从任意URL处理媒体内容，包括触发

CVSS 4.3 · Medium EPSS 0.46% · P38

Affected Version Matrix 2

VendorProduct Version RangeStatus
Facebook WhatsApp for Android 2.25.8.0< 2.26.7.10 affected
Facebook WhatsApp for iOS 2.25.8.0< 2.26.15.72 affected
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I. Basic Information for CVE-2026-23866

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Facebook WhatsApp 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Facebook WhatsApp是美国Facebook公司的一套基于Android平台的、利用网络传送短信的移动应用程序。该应用程序通过智能手机中的联络人信息，查找使用该软件的联络人传送文字、图片等。 Facebook WhatsApp v2.25.8.0至v2.26.15.72版本和WhatsApp for Android v2.25.8.0至v2.26.7.10版本存在安全漏洞，该漏洞源于对Instagram Reels的AI丰富响应消息验证不完整，可能导致用户触发从任意URL处理媒体内容，包括触发
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Facebook WhatsApp for Android 2.25.8.0 ~ 2.26.7.10 -
Facebook WhatsApp for iOS 2.25.8.0 ~ 2.26.15.72 -

II. Public POCs for CVE-2026-23866

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III. Intelligence Information for CVE-2026-23866

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Vendor Advisories for CVE-2026-23866 (2)

IV. Related Vulnerabilities

Same product: WhatsApp for Android
Same vendor: Facebook

V. Comments for CVE-2026-23866

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