CVE Record
[ HIGH ]CVE-2019-18426
WhatsApp Cross-Site Scripting Vulnerability
A vulnerability in WhatsApp Desktop when paired with WhatsApp for iPhone allows cross-site scripting and local file reading.
- Vendor
- Meta Platforms
- Product
- CVSS
- 8.2
- EPSS (exploit probability)
- 67.9%
- Status
- kev
- CISA patch-by (BOD 22-01)
- Added to KEV
Is CVE-2019-18426 being exploited?
Yes. CISA added CVE-2019-18426 to its Known Exploited Vulnerabilities catalog on . CISA only lists a CVE when it has reliable evidence of exploitation in the wild.
FIRST's EPSS model puts the probability of exploitation activity in the next 30 days at 67.9% (scored October 14, 2026).
- CISA KEV[ LISTED ]
- ENISA EUVD (exploited)[ — ]
- CIRCL KEV[ — ]
Catalog snapshot 2026-10-21. Full cross-catalog view: /kev-comparison
What to do
CISA required actionApply updates per vendor instructions.
US federal civilian agencies must remediate by (21 days after listing) under BOD 22-01. Everyone else: that deadline is a sensible upper bound, not a target. Vendor guidance and the NVD record are linked under Source above.
Other Meta Platforms WhatsApp CVEs we track
| CVE / Vulnerability | Severity | CVSS | EPSS | Added to KEV |
|---|---|---|---|---|
| CVE-2025-55177 Meta Platforms WhatsApp Incorrect Authorization Vulnerability | [ MEDIUM ] | 5.4 | 4.7% | |
| CVE-2019-3568 WhatsApp VOIP Stack Buffer Overflow Vulnerability | [ CRITICAL ] | 9.8 | 30.1% |