CVE-2026-2789: Use-after-free in the Graphics: ImageLib component

Published Feb 24, 2026
·
Updated

Use-after-free in the Graphics: ImageLib component. This vulnerability affects Firefox < 148, Firefox ESR < 115.33, and Firefox ESR < 140.8.

Other sources

Use-after-free in the Graphics: ImageLib component. This vulnerability was fixed in Firefox 148, Firefox ESR 115.33, Firefox ESR 140.8, Thunderbird 148, and Thunderbird 140.8.

— MITRE

Affected Software

10 affected componentsFixes available
Mozilla Firefox<148
148
Mozilla Firefox ESR<140.8
140.8
Mozilla Firefox ESR<115.33
115.33
Mozilla Thunderbird<148
148
Mozilla Thunderbird<140.8
140.8
Mozilla Firefox<115.33.0
Mozilla Firefox<148.0
Mozilla Firefox>=128.0<140.8.0
Mozilla Thunderbird<140.8.0
Mozilla Thunderbird<148.0

Event History

Feb 24, 2026
CVE Published
via Mozilla·12:00 AM
Data Sourced
via Mozilla·12:00 AM
DescriptionSeverityAffected Software
Updated
via Mozilla·12:00 AM
Affected Software
CVE Published
via MITRE·01:33 PM
Data Sourced
via MITRE·01:33 PM
Description
Data Sourced
via Red Hat·02:04 PM
DescriptionSeverityAffected Software
Data Sourced
via NVD·02:16 PM
DescriptionSeverityWeaknessAffected Software
Jan 4, 58137
Event
via FIRST·09:31 PM

Parent advisories

This vulnerability appears in the following advisories.

Peer vulnerabilities

Found alongside the following vulnerabilities.

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Frequently Asked Questions

1

What is the severity of CVE-2026-2789?

CVE-2026-2789 has been classified as a high-severity vulnerability due to the potential for exploitation leading to arbitrary code execution.

2

How do I fix CVE-2026-2789?

To fix CVE-2026-2789, upgrade to Mozilla Firefox version 148 or Firefox ESR versions 115.33 or 140.8.

3

What systems are affected by CVE-2026-2789?

CVE-2026-2789 affects Firefox versions prior to 148, Firefox ESR versions prior to 115.33, and Firefox ESR versions prior to 140.8.

4

What type of vulnerability is CVE-2026-2789?

CVE-2026-2789 is a use-after-free vulnerability in the Graphics: ImageLib component.

5

Can CVE-2026-2789 lead to data breaches?

Yes, CVE-2026-2789 has the potential to lead to data breaches by allowing attackers to execute arbitrary code.

Company

Resources

Contact

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