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CVE-2026-40451

MEDIUM
5.1
CVSS Score
Published: April 22, 2026 at 04:28 AM UTC
Updated: October 26, 2026 at 09:10 PM UTC
1 product affected across 1 vendorChrome Browser Extension

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Severity
MEDIUM5.1
Exploit prediction
EPSS 0.2%
SSVC
No known exploit

Description

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (2)

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

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

5.1MEDIUMjpcert
Vector?

Quick Info

StatusDEFERRED
CWE
CWE-79

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