What’s Vulnerable › Vulnerabilities

CVE-2025-11152: Sandbox escape due to integer overflow in the Graphics: Canvas2D component

• Severity: high (CVSS 8.6 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-09-30 · updated 2026-06-17
• Weakness: CWE-190

Description

Sandbox escape due to integer overflow in the Graphics: Canvas2D component. This vulnerability was fixed in Firefox 143.0.3.

Affected products

• Mozilla Firefox: before 143.0.3 — fixed in 143.0.3

How to fix

Upgrade to a fixed version: Mozilla Firefox 143.0.3. Check the vendor advisory for mitigations.

References

• https://bugzilla.mozilla.org/show_bug.cgi?id=1987246
• https://www.mozilla.org/security/advisories/mfsa2025-80/

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