CVE-2026-4719

CWE-754CWE-119 — Buffer OverflowCWE-80512 documents9 sources
Severity
7.5HIGH
EPSS
0.0%
top 94.67%
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 Graphics: Text 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:N/I:N/A:HExploitability: 3.9 | Impact: 3.6

Affected Packages6 packages

▶CVEListV5mozilla/firefoxunspecified — 149
▶NVDmozilla/firefox< 140.9.0+1
▶CVEListV5mozilla/firefox_esrunspecified — 140.9
▶CVEListV5mozilla/thunderbirdunspecified — 149+1
▶Debianfirefox-esr< 140.9.0esr-1~deb11u1+3

🔴Vulnerability Details

3
CVEList
Incorrect boundary conditions in the Graphics: Text component↗2026-03-24
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GHSA
GHSA-qpjg-cffw-8m4r: Incorrect boundary conditions in the Graphics: Text component↗2026-03-24
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OSV
CVE-2026-4719: Incorrect boundary conditions in the Graphics: Text component↗2026-03-24
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📋Vendor Advisories

6
Red Hat
firefox: thunderbird: Incorrect boundary conditions in the Graphics: Text component↗2026-03-24
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Debian
CVE-2026-4719: firefox - Incorrect boundary conditions in the Graphics: Text component. This vulnerabilit...↗2026
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Mozilla
Mozilla Foundation Security Advisory 2026-23: CVE-2026-4719↗
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Mozilla
Mozilla Foundation Security Advisory 2026-22: CVE-2026-4719↗
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Mozilla
Mozilla Foundation Security Advisory 2026-24: CVE-2026-4719↗
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🕵️Threat Intelligence

1
Wiz
CVE-2026-4719 Impact, Exploitability, and Mitigation Steps | Wiz↗
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💬Community

1
Bugzilla
CVE-2026-4719 firefox: thunderbird: Incorrect boundary conditions in the Graphics: Text component↗2026-03-24
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CVE-2026-4719 (HIGH CVSS 7.5) | Incorrect boundary conditions in th | cvebase.io