What is CVE-2025-11152?

CVE-2025-11152 is a high-severity vulnerability in Mozilla Firefox, classified under Integer Overflow or Wraparound. CVSS score: 8.6/10. Published 2025-09-30.

How severe is CVE-2025-11152?

High severity. CVSS v3 base score is 8.6 out of 10.

Is CVE-2025-11152 known to be exploited?

2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Integer overflow in Mozilla Firefox

CVE-2025-11152

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

Vulnerability class: Integer Overflow

EPSS: 0.003 (16.7th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.6 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:L.

Affected products

Mozilla Firefox — versions 143.0.3

Weakness classification (CWE)

CWE-190 — Integer Overflow or Wraparound

Public proof-of-concept exploits

References

security@mozilla.org (Permissions Required, Issue Tracking)
security@mozilla.org (Vendor Advisory)

Frequently asked questions

What is CVE-2025-11152?: CVE-2025-11152 is a high-severity vulnerability in Mozilla Firefox, classified under Integer Overflow or Wraparound. CVSS score: 8.6/10. Published 2025-09-30.
How severe is CVE-2025-11152?: High severity. CVSS v3 base score is 8.6 out of 10.
Is CVE-2025-11152 known to be exploited?: 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.