CVE-2025-11152Network attack vector

Sandbox escape via Canvas2D integer overflow

Published Sep 30, 2025 · Updated Apr 13, 2026

Integer overflow in Mozilla Firefox Canvas2D before 143.0.3 allows remote attackers to escape the browser sandbox via unspecified vectors. Mozilla identifies the affected locus only as the Graphics: Canvas2D component; the restricted bug record leaves the overflowing calculation and attacker-controlled input undisclosed. The published record does not disclose the delivery precondition or post-escape actions available beyond crossing the browser sandbox boundary.

CVSS severity8.6
High
EPSS probability0.27%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Integer overflow in Mozilla Firefox Canvas2D before 143.0.3 allows remote attackers to escape the browser sandbox via unspecified vectors. Mozilla identifies the affected locus only as the Graphics: Canvas2D component; the restricted bug record leaves the overflowing calculation and attacker-controlled input undisclosed. The published record does not disclose the delivery precondition or post-escape actions available beyond crossing the browser sandbox boundary.

The record

CVE
CVE-2025-11152
Published
Sep 30, 2025
Updated
Apr 13, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-190, T1211
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 30, 2025CVE publishedPublication date reported by the CVE source.
  2. Apr 13, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

8.6CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:L

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-190Integer Overflow or Wraparound
T1211Exploitation for Defense Evasion

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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