What’s Vulnerable › Vulnerabilities

CVE-2026-5733: Incorrect boundary conditions in the Graphics: WebGPU component

• Severity: high (CVSS 8.8 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: 2026-04-07 · updated 2026-10-26
• Weakness: CWE-119

Description

Incorrect boundary conditions in the Graphics: WebGPU component. This vulnerability was fixed in Firefox 149.0.2 and Thunderbird 149.0.2.

Affected products

• Mozilla Firefox: before 149.0.2 — fixed in 149.0.2

How to fix

Upgrade to a fixed version: Mozilla Firefox 149.0.2. Check the vendor advisory for mitigations.

References

• https://bugzilla.mozilla.org/show_bug.cgi?id=2022554
• https://www.mozilla.org/security/advisories/mfsa2026-25/
• https://www.mozilla.org/security/advisories/mfsa2026-28/
• https://access.redhat.com/security/cve/CVE-2026-5733
• https://bugzilla.redhat.com/show_bug.cgi?id=2455902
• https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-5733.json

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