What’s Vulnerable › Vulnerabilities

CVE-2026-15718: Invalid pointer in the JavaScript: WebAssembly component

• Severity: medium (CVSS 4.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-07-14 · updated 2026-07-22
• Weakness: CWE-763

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.

Affected products

• Mozilla Firefox: before 152.0.6 — fixed in 152.0.6

How to fix

Upgrade to a fixed version: Mozilla Firefox 152.0.6. Check the vendor advisory for mitigations.

References

• https://bugzilla.mozilla.org/show_bug.cgi?id=2045443
• https://www.mozilla.org/security/advisories/mfsa2026-67/
• https://www.mozilla.org/security/advisories/mfsa2026-70/
• https://www.mozilla.org/security/advisories/mfsa2026-72/

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