CVE-2025-14322 — Improper Check for Unusual or Exceptional Conditions in Mozilla Firefox

CWE-754 — Improper Check for Unusual or Exceptional Conditions13 documents9 sources
Severity
8.0HIGHNVD
EPSS
0.1%
top 80.52%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
2
Mozilla ThunderbirdMozilla Firefox
Timeline
PublishedDec 9
Latest updateFeb 2

Description

Sandbox escape due to incorrect boundary conditions in the Graphics: CanvasWebGL component. This vulnerability was fixed in Firefox 146, Firefox ESR 115.31, Firefox ESR 140.6, Thunderbird 146, and Thunderbird 140.6.

CVSS vector

CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:NExploitability: 1.6 | Impact: 5.8

Affected Packages3 packages

▶NVDmozilla/firefox116.0 — 140.6.0+2
▶NVDmozilla/thunderbird< 140.6.0+1
▶Debianmozilla/thunderbird< 1:140.6.0esr-1~deb11u1+3

🔴Vulnerability Details

3
CVEList
Sandbox escape due to incorrect boundary conditions in the Graphics: CanvasWebGL component↗2025-12-09
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GHSA
GHSA-w8g6-3pw6-4hxr: Sandbox escape due to incorrect boundary conditions in the Graphics: CanvasWebGL component↗2025-12-09
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OSV
CVE-2025-14322: Sandbox escape due to incorrect boundary conditions in the Graphics: CanvasWebGL component↗2025-12-09
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📋Vendor Advisories

8
Ubuntu
Thunderbird vulnerabilities↗2026-02-02
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Red Hat
firefox: thunderbird: Sandbox escape due to incorrect boundary conditions in the Graphics: CanvasWebGL component↗2025-12-09
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Debian
CVE-2025-14322: firefox - Sandbox escape due to incorrect boundary conditions in the Graphics: CanvasWebGL...↗2025
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Mozilla
Mozilla Foundation Security Advisory 2025-92: CVE-2025-14322↗
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Mozilla
Mozilla Foundation Security Advisory 2025-95: CVE-2025-14322↗
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🕵️Threat Intelligence

1
Wiz
CVE-2025-14322 Impact, Exploitability, and Mitigation Steps | Wiz↗
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CVE-2025-14322 — Mozilla Firefox vulnerability | cvebase