Boundary Condition Flaw in Firefox's Layout: Block and Inline Component
CVE-2026-120572

8.8HIGH

Key Information:

Vendor

Mozilla
Status
Firefox
Vendor
CVE Published:
3 November 2026

What is CVE-2026-120572?

A boundary condition flaw exists in the Layout: Block and Inline component of Firefox, potentially leading to unintended behavior or manipulation. This issue highlights the need for proper boundary checks to ensure a secure operating environment. Mozilla addressed this vulnerability in version 159.0.1, reinforcing the importance of keeping software up to date for optimal security.

Affected Version(s)

Firefox 159.0.1

References

https://bugzilla.mozilla.org/show_bug.cgi?id=2079035
https://www.mozilla.org/security/advisories/mfsa2026-123/

CVSS V3.1

Score:
8.8
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
Required
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Mozilla
.