4.3

CVE-2026-23866: facebook whatsapp for android

CVSS: 4.3v3.1MediumAnalyzed
Published 01-05-2026Last modified 01-05-2026
Open JSON

Vulnerability summary

CVE-2026-23866 is a medium (CVSS 4.3) vulnerability in facebook whatsapp for android. EPSS estimates a 0.46% chance of exploitation in the next 30 days, higher than 38.9% of scored vulnerabilities.

Overall risk
17/100
0100
Low · default modelHow is this calculated?
CVSS score
4.3/10
010
Medium · v3.1 (CVE.org)
EPSS score
0.46%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 01-05-2026
    PublishedVulnerability first disclosed.
  2. 01-05-2026
    Last modifiedVulnerability information updated.

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.

CVSS metrics

2 scores · 2 sources · 1 version

EPSS trend

Probability

0.46%

Chance of exploitation in the next 30 days

Percentile

39%

Versus all other CVEs

30-day change

0.00 pp

From 0.46% on 20-09-2026

20-09-202620-10-2026
EPSS score
0.46%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Facebook2 products
Whatsapp1 product
  • whatsapp≥ 2.25.8.0, ≤ 2.26.7.10 | ≥ 2.25.8.0, ≤ 2.26.15.72

2 vendors · 3 products

References

2 links