CVE-2026-16354

Analyzed Analyzed - Analysis Complete

Information Disclosure in Firefox ImageLib

Publication date: 2026-07-21

Last updated on: 2026-07-24

Assigner: Mozilla Corporation

Description

Information disclosure in the Graphics: ImageLib component. This vulnerability was fixed in Firefox 153, Firefox ESR 115.38, Firefox ESR 140.13, Thunderbird 153, and Thunderbird 140.13.

CVSS Scores

EPSS Scores

Probability:
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Meta Information

Published

2026-07-21

Last Modified

2026-07-24

Generated

2026-08-10

AI Q&A

2026-07-21

EPSS Evaluated

2026-08-09

NVD

CVE-2026-16354

EUVD

EUVD-2026-46199

Affected Vendors & Products

Vendor	Product	Version / Range
mozilla	firefox	to 153.0.0 (exc)
mozilla	firefox	to 115.38.0 (exc)
mozilla	firefox	From 128.1.0 (inc) to 140.13.0 (exc)
mozilla	thunderbird	to 140.13.0 (exc)
mozilla	thunderbird	From 141.0 (inc) to 153.0 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-200	The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information.

Attack-Flow Graph

Executive Summary

This is an information disclosure vulnerability in Firefox's Graphics: ImageLib component. It was patched in Firefox 153 and specific Firefox ESR versions (115.38 and 140.13). The issue allowed unauthorized access to sensitive data through the affected component.

Detection Guidance

This vulnerability is fixed in Firefox 153, Firefox ESR 115.38, and Firefox ESR 140.13. To detect it, check your installed Firefox version using commands like 'firefox --version' or 'apt show firefox' (Linux) or 'about:support' in Firefox. If your version is below these thresholds, the system is vulnerable.

Impact Analysis

If exploited, this vulnerability could allow attackers to access confidential or sensitive information processed by the Graphics: ImageLib component in Firefox. Users running unpatched versions may have their data exposed.

Compliance Impact

This vulnerability could lead to non-compliance with GDPR or HIPAA if it results in unauthorized data exposure. Organizations must ensure patched versions are deployed to maintain regulatory compliance and protect user data.

Mitigation Strategies

Update Firefox to version 153 or later, Firefox ESR to version 115.38 or later, or Firefox ESR to version 140.13 or later to address the information disclosure vulnerability in the Graphics: ImageLib component.

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