CVE-2026-6762 — UI Misrepresentation / Clickjacking in Mozilla Firefox

CWE-1021 — UI Misrepresentation / ClickjackingCWE-290 — Authentication Bypass by Spoofing9 documents5 sources
Severity
6.1MEDIUM
No vector
EPSS
0.0%
top 86.74%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
3
Mozilla FirefoxMozilla Firefox ESRMozilla Thunderbird
Timeline
PublishedApr 21

Description

Spoofing issue in the DOM: Core & HTML component. This vulnerability was fixed in Firefox 150, Firefox ESR 115.35, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10.

Affected Packages3 packages

▶Mozillamozilla/firefox< Firefox 150
▶Mozillamozilla/firefox_esr< Firefox ESR 115.35+1
▶Mozillamozilla/thunderbird< Thunderbird 140.10+1

🔴Vulnerability Details

1
GHSA
GHSA-h3rr-2q6v-g8rc: Spoofing issue in the DOM: Core & HTML component↗2026-04-21
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📋Vendor Advisories

6
Red Hat
firefox: Spoofing issue in the DOM: Core & HTML component↗2026-04-21
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Mozilla
Mozilla Foundation Security Advisory 2026-31: CVE-2026-6762↗
▶
Mozilla
Mozilla Foundation Security Advisory 2026-34: CVE-2026-6762↗
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Mozilla
Mozilla Foundation Security Advisory 2026-32: CVE-2026-6762↗
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Mozilla
Mozilla Foundation Security Advisory 2026-30: CVE-2026-6762↗
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💬Community

1
Bugzilla
CVE-2026-6762 firefox: Spoofing issue in the DOM: Core & HTML component↗2026-04-21
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CVE-2026-6762 — UI Misrepresentation / Clickjacking | cvebase