CVE-2026-23866

mediumpriority · track · 0EPSS 0.005 · 41 %ileDEEUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

0.47% (41st) EPSS

CVSS 4.3 · medium

Is it mine?

8 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · cert_bund · nvd

EPSS · scored 2026-10-27

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

Technical severity, 0–10. One row per scoring source.

4.3

010

base score 0–10 · higher = more severe · hover a vector to decode

v3.14.3mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N/E:F/RL:O/RC:Csecondary · ENISA EU

v3.14.3mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:Nsecondary · cve-assign@fb.comexploitability 2.8 · impact 1.4

v3.14mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N/E:Usecondary · CVSS-BT (t0sche)

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Trackcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-940US

affected products (8)

Products and version ranges known to be affected.

Meta WhatsApp Android <=2.26.7.10all versionscert_bundDE
Meta WhatsApp iOS <=2.26.15.72all versionscert_bundDE
Meta WhatsApp≤ Android <=2.26.7.10cert_bundDE
Meta WhatsApp≤ iOS <=2.26.15.72cert_bundDE
Facebook WhatsApp for Android2.25.8.0 → 2.26.7.10enisa_euvdEU
Facebook WhatsApp for iOS2.25.8.0 → 2.26.15.72enisa_euvdEU
whatsapp whatsapp2.25.8.0 → 2.26.15.72nvdUScpe:2.3:a:whatsapp:whatsapp:*:*:*:*:*:*:*:*
whatsapp whatsapp2.25.8.0 → 2.26.7.10nvdUScpe:2.3:a:whatsapp:whatsapp:*:*:*:*:*:*:*:*

advisories (1)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2026-1361Meta WhatsApp: Mehrere SchwachstellenDeutsch2026-05-04csaf · cert_bundDE
Ein Angreifer kann mehrere Schwachstellen in Meta WhatsApp ausnutzen, um falsche Informationen darzustellen oder vertrauliche Informationen offenzulegen.

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd cert_bund nvd NVD CVE.org MITRE

published 2026-05-01modified 2026-10-26

references (6)

External citations — patches, advisories, analysis.

scry

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