CVE-2026-92072

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Incorrect Boundary Conditions in Firefox Safe Browsing

Publication date: 2026-09-15

Last updated on: 2026-09-22

Assigner: Mozilla Corporation

Description

Incorrect boundary conditions in the Safe Browsing component. This vulnerability was fixed in Firefox 156, Firefox ESR 153.3, and Thunderbird 156.

CVSS Scores

EPSS Scores

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Meta Information

Published

2026-09-15

Last Modified

2026-09-22

Generated

2026-10-05

AI Q&A

2026-09-15

EPSS Evaluated

2026-10-04

NVD

CVE-2026-92072

EUVD

EUVD-2026-78457

Affected Vendors & Products

Vendor	Product	Version / Range
mozilla	firefox	156
mozilla	firefox_esr	153.3

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-119	The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.

Attack-Flow Graph

Executive Summary

This vulnerability involves incorrect boundary conditions in the Safe Browsing component of Firefox. It was addressed in Firefox 156 and Firefox ESR 153.3.

Detection Guidance

This vulnerability is specific to Firefox versions before 156, Firefox ESR before 153.3, and Thunderbird before 156. Detection involves checking installed versions of these applications. For Firefox, run 'firefox --version' or check 'about:support' in the browser. For Thunderbird, run 'thunderbird --version'. If versions are below the patched releases, the system is vulnerable.

Impact Analysis

Incorrect boundary conditions could allow unexpected behavior in the Safe Browsing feature, potentially leading to security risks like bypassing protections or exposing users to malicious content.

Mitigation Strategies

Update Firefox to version 156 or later and Firefox ESR to version 153.3 or later to address the Safe Browsing boundary condition issue.

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