CVE-2026-40451

DeepL Chrome browser extension versions from v1.22.0 to v.1.23.0 contain a cross-site scripting vulnerability, which allows an attacker to execute arbitrary script in a user's browser, and inject malicious HTML into web pages viewed by the user.

Score

CVSS 3.0 6.1 Medium

Status

Deferred - vultures@jpcert.or.jp

Published

2026-04-22

Last modified

2026-10-26

Weaknesses

CWE-79

Affected products

• Chrome Browser Extension (Deepl)

References

• https://github.com/DeepLcom/deepl-chrome-extension/security/advisories/GHSA-4x2r-q3p9-xhx4
• https://jvn.jp/en/jp/JVN37524771/