CVE-2026-4710

CWE-119 — Buffer OverflowCWE-787 — Out-of-bounds Write12 documents9 sources
Severity
9.8CRITICAL
EPSS
0.0%
top 93.89%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
3
Mozilla FirefoxMozilla Firefox ESRMozilla Thunderbird
Timeline
PublishedMar 24

Description

Incorrect boundary conditions in the Audio/Video component. This vulnerability affects Firefox < 149, Firefox ESR < 140.9, Thunderbird < 149, and Thunderbird < 140.9.

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 — 149
▶NVDmozilla/firefox< 140.9.0+1
▶CVEListV5mozilla/firefox_esrunspecified — 140.9
▶CVEListV5mozilla/thunderbirdunspecified — 149+1
▶NVDmozilla/thunderbird< 140.9.0+1

🔴Vulnerability Details

3
CVEList
Incorrect boundary conditions in the Audio/Video component↗2026-03-24
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GHSA
GHSA-6q85-p5cm-28vf: Incorrect boundary conditions in the Audio/Video component↗2026-03-24
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OSV
CVE-2026-4710: Incorrect boundary conditions in the Audio/Video component↗2026-03-24
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📋Vendor Advisories

6
Red Hat
firefox: thunderbird: Incorrect boundary conditions in the Audio/Video component↗2026-03-24
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Debian
CVE-2026-4710: firefox - Incorrect boundary conditions in the Audio/Video component. This vulnerability a...↗2026
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Mozilla
Mozilla Foundation Security Advisory 2026-20: CVE-2026-4710↗
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Mozilla
Mozilla Foundation Security Advisory 2026-22: CVE-2026-4710↗
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Mozilla
Mozilla Foundation Security Advisory 2026-24: CVE-2026-4710↗
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🕵️Threat Intelligence

1
Wiz
CVE-2026-4710 Impact, Exploitability, and Mitigation Steps | Wiz↗
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💬Community

1
Bugzilla
CVE-2026-4710 firefox: thunderbird: Incorrect boundary conditions in the Audio/Video component↗2026-03-24
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