# CVE-2019-18426: WhatsApp Cross-Site Scripting Vulnerability

> CVE-2019-18426: WhatsApp Cross-Site Scripting Vulnerability. CVSS 8.2 (CVSS 3.1), in CISA KEV.

Canonical: https://rewindex.com/cve/CVE-2019-18426
Last updated: 2025-10-21T23:35:53Z

- Published: 2020-01-21 20:30 UTC · Updated: 2025-10-21 23:35 UTC · Assigner: facebook
- CVSS: 8.2 (CVSS 3.1) · Severity: High · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:N
- EPSS: 67.9%, 99th percentile (scored 2026-10-25)
- CISA KEV: yes, added 2022-05-23, federal due date 2022-06-13, ransomware use: Unknown
- CWE: CWE-79

## 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.

## CISA required action

Apply updates per vendor instructions.

## Affected vendors and products

- Facebook: WhatsApp Desktop

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2019-18426)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2019-18426)
- [http://packetstormsecurity.com/files/157097/WhatsApp-Desktop-0.3.9308-Cross-Site-Scripting.html](http://packetstormsecurity.com/files/157097/WhatsApp-Desktop-0.3.9308-Cross-Site-Scripting.html)
- [https://www.facebook.com/security/advisories/cve-2019-18426](https://www.facebook.com/security/advisories/cve-2019-18426)

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_Sources: CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (https://www.cve.org/) This product uses data from the NVD API but is not endorsed or certified by the NVD. (https://nvd.nist.gov/) Known Exploited Vulnerabilities catalog from CISA. (https://www.cisa.gov/known-exploited-vulnerabilities-catalog) EPSS scores from FIRST (Exploit Prediction Scoring System). (https://www.first.org/epss/)_


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Canonical: https://rewindex.com/cve/CVE-2019-18426 · Markdown: https://rewindex.com/cve/CVE-2019-18426.md · JSON: https://rewindex.com/api/v1/cves/CVE-2019-18426 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T03:10:19.604Z