CVE-2026-23866Incomplete 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 trigg…
Updated under an hour ago ()
Does this affect you?
It affects Facebook WhatsApp for Android and 2 other products. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
Do this next
Free account, 1 product
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.
- CVSS
- 4.3 MEDIUM (v3.1, CNA)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
- Weakness (CWE)
- CWE-940
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Meta
- NVD analysis
- Analyzed
- Record last updated
- May 1, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Facebook WhatsApp for Android facebook:whatsapp_for_android (from the name) | from 2.25.8.0 before 2.26.7.10 | CNA record |
Facebook WhatsApp for iOS facebook:whatsapp_for_ios (from the name) | from 2.25.8.0 before 2.26.15.72 | CNA record |
whatsapp whatsapp whatsapp:whatsapp | from 2.25.8.0 through 2.26.7.10; from 2.25.8.0 through 2.26.15.72 | NVD |
References
- https://www.facebook.com/security/advisories/cve-2026-23866x-refsource-confirm, third-party-advisory
- https://www.whatsapp.com/security/advisories/2026x-refsource-confirm, vendor-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.