CVE-2026-2784

CWE-28812 documents9 sources
Severity
9.8CRITICAL
EPSS
0.1%
top 80.48%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
3
Mozilla FirefoxMozilla Firefox ESRMozilla Thunderbird
Timeline
PublishedFeb 24

Description

Mitigation bypass in the DOM: Security component. This vulnerability affects Firefox < 148, Firefox ESR < 140.8, Thunderbird < 148, and Thunderbird < 140.8.

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HExploitability: 3.9 | Impact: 5.9

Affected Packages7 packages

▶CVEListV5mozilla/firefoxunspecified — 148
▶NVDmozilla/firefox< 140.8.0+1
▶CVEListV5mozilla/firefox_esrunspecified — 140.8
▶CVEListV5mozilla/thunderbirdunspecified — 148+1
▶NVDmozilla/thunderbird< 140.8.0+1

🔴Vulnerability Details

3
CVEList
Mitigation bypass in the DOM: Security component↗2026-02-24
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GHSA
GHSA-p4fg-vw73-vr29: Mitigation bypass in the DOM: Security component↗2026-02-24
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OSV
CVE-2026-2784: Mitigation bypass in the DOM: Security component↗2026-02-24
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📋Vendor Advisories

6
Red Hat
firefox: thunderbird: Mitigation bypass in the DOM: Security component↗2026-02-24
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Debian
CVE-2026-2784: firefox - Mitigation bypass in the DOM: Security component. This vulnerability affects Fir...↗2026
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Mozilla
Mozilla Foundation Security Advisory 2026-13: CVE-2026-2784↗
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Mozilla
Mozilla Foundation Security Advisory 2026-16: CVE-2026-2784↗
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Mozilla
Mozilla Foundation Security Advisory 2026-15: CVE-2026-2784↗
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🕵️Threat Intelligence

1
Wiz
CVE-2026-2784 Impact, Exploitability, and Mitigation Steps | Wiz↗
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💬Community

1
Bugzilla
CVE-2026-2784 firefox: thunderbird: Mitigation bypass in the DOM: Security component↗2026-02-24
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