CVE-2026-117933
Received Received - Intake

CSS Frame Poisoning in Firefox and Firefox ESR

Publication date: 2026-10-27

Last updated on: 2026-10-27

Assigner: Mozilla Corporation

Description
Frame poisoning in the CSS Parsing and Computation component. This vulnerability was fixed in Firefox 159 and Firefox ESR 153.6.

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Meta Information

Published
2026-10-27
Last Modified
2026-10-27
Generated
2026-10-27
AI Q&A
2026-10-27
EPSS Evaluated
N/A
NVD
CVE-2026-117933
EUVD
EUVD-2026-110964

Affected Vendors & Products

Currently, no data is known.

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Exploitability

CWE
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KEV
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CWE ID Description
CWE-UNKNOWN

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Executive Summary

Frame poisoning in the CSS Parsing and Computation component allows for potential manipulation of rendered frames in Firefox. This issue was addressed in Firefox 159 and Firefox ESR 153.6.

Impact Analysis

This vulnerability could allow attackers to alter the appearance of web pages, potentially leading to phishing attacks or misleading users by manipulating how content is displayed.

Mitigation Strategies

Update Firefox to version 159 or later and Firefox ESR to version 153.6 or later to address the frame poisoning vulnerability in the CSS Parsing and Computation component.

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