CVE-2026-5732

CWE-190 — Integer Overflow12 documents9 sources
Severity
8.8HIGH
EPSS
0.0%
top 87.17%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
3
Mozilla FirefoxMozilla Firefox ESRMozilla Thunderbird
Timeline
PublishedApr 7

Description

Incorrect boundary conditions, integer overflow in the Graphics: Text component. This vulnerability affects Firefox < 149.0.2, Firefox ESR < 140.9.1, Thunderbird < 149.0.2, and Thunderbird < 140.9.1.

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:HExploitability: 2.8 | Impact: 5.9

Affected Packages5 packages

▶CVEListV5mozilla/firefoxunspecified — 149.0.2
▶NVDmozilla/firefox< 140.9.1+1
▶CVEListV5mozilla/firefox_esrunspecified — 140.9.1
▶CVEListV5mozilla/thunderbirdunspecified — 149.0.2+1
▶Debianfirefox-esr< 140.9.1esr-1~deb12u1+1

🔴Vulnerability Details

3
GHSA
GHSA-mj57-mxq8-qvw9: Incorrect boundary conditions, integer overflow in the Graphics: Text component↗2026-04-07
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OSV
CVE-2026-5732: Incorrect boundary conditions, integer overflow in the Graphics: Text component↗2026-04-07
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CVEList
Incorrect boundary conditions, integer overflow in the Graphics: Text component↗2026-04-07
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📋Vendor Advisories

6
Red Hat
firefox: thunderbird: Incorrect boundary conditions, integer overflow in the Graphics: Text component↗2026-04-07
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Debian
CVE-2026-5732: firefox - Incorrect boundary conditions, integer overflow in the Graphics: Text component....↗2026
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Mozilla
Mozilla Foundation Security Advisory 2026-29: CVE-2026-5732↗
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Mozilla
Mozilla Foundation Security Advisory 2026-25: CVE-2026-5732↗
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Mozilla
Mozilla Foundation Security Advisory 2026-27: CVE-2026-5732↗
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🕵️Threat Intelligence

1
Wiz
CVE-2026-5732 Impact, Exploitability, and Mitigation Steps | Wiz↗
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💬Community

1
Bugzilla
CVE-2026-5732 firefox: thunderbird: Incorrect boundary conditions, integer overflow in the Graphics: Text component↗2026-04-07
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CVE-2026-5732 (HIGH CVSS 8.8) | Incorrect boundary conditions | cvebase.io