Reference page — cumulative record through Sunday, October 4, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2019-18426

CVE-2019-18426HIGH

Facebook WhatsApp Desktop — Meta Platforms WhatsApp

  AV  AC  PR  UI  S  C  I  A   CVSS    EPSS   %ile   KEV
   N   L   N   R  C  H  L  N    8.2   .6786   99.3   YES

AFFECTED
  Product           Versions    Fixed
  WhatsApp Desktop  0.3.9309 –  —

TIMELINE
  Oct 25  Reserved by facebook
  Jan 21  Published (CNA: facebook)
  May 23  Added to CISA KEV, remediation due 2022-06-13

CWE-79 · CNA: facebook · CVSS v3.1 · 3 references · KEV due June 13, 2022

Description

A vulnerability in WhatsApp Desktop versions prior to 0.3.9309 when paired with WhatsApp for iPhone versions prior to 2.20.10 allows cross-site scripting and local file reading. Exploiting the vulnerability requires the victim to click a link preview from a specially crafted text message.

Lifecycle

Complete event history — 3 events, chronological
Date	Event	Detail
October 25, 2019	Reserved	Reserved by facebook
January 21, 2020	Published	Published (CNA: facebook)
May 23, 2022	KEV ADDED	Added to CISA KEV, remediation due 2022-06-13

Affected

Affected products and packages — 1 row
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
Facebook	WhatsApp Desktop	—	0.3.9309	—

Weaknesses

CWE-79

References (3)

http://packetstormsecurity.com/files/157097/WhatsApp-Desktop-0.3.9308-Cross-Site-Scripting.html [x_refsource_MISC]
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2019-18426 [government-resource]
https://www.facebook.com/security/advisories/cve-2019-18426 [x_refsource_CONFIRM]

Authoritative record: CVE-2019-18426 at cve.org

Vendors: facebook

Weaknesses: CWE-79

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2019-18426 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Sunday, October 4, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.