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CVE-2026-15718

Medium

Description

We are aware that exploit code for this is public however we are not aware of any attacks in the wild abusing this flaw. This vulnerability was fixed in Firefox 152.0.6, Firefox ESR 140.13, and Thunderbird 140.13.

SeverityMedium
CVSS4.3
Exploit probability—
ProductMozilla Firefox
PublishedJul 14, 2026
First seenJul 14, 2026
Weakness typeCWE-763CWE-763

How to fix

Update
  • mozilla firefox152.0.6 or later

Affected products

ProductAffected versionsFixed in
mozilla firefoxv < 152.0.6152.0.6

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Choose the product and enter the version you run to see whether it falls in the affected range.

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