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CVE-2026-109711

Medium

Description

Use-after-free in the Graphics: Canvas2D component. This vulnerability was fixed in Firefox 158, Firefox ESR 153.5, Thunderbird 158, and Thunderbird 153.5.

SeverityMedium
CVSS5.4
Exploit probability—
ProductFirefox
PublishedOct 13, 2026
First seenOct 13, 2026
Weakness typeCWE-416Use after free

How to fix

Update
  • Firefox158 or later
  • Firefox ESR153.5 or later
  • Thunderbird158, 153.5 or later

Affected products

ProductAffected versionsFixed in
FirefoxNo range specified158
Firefox ESRNo range specified153.5
ThunderbirdNo range specified158, 153.5

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