VulnerabilityModified
CVE-2026-5733
This vulnerability was fixed in Firefox 149.0.2 and Thunderbird 149.0.2.
HIGH 8.8EPSS 0.30%
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.30%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
Incorrect boundary conditions in the Graphics: WebGPU component. This vulnerability was fixed in Firefox 149.0.2 and Thunderbird 149.0.2.
- CVSS 3.1
- 8.8 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- EPSS
- 0.30% probability · 23th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-119, CWE-787
- Affected
- mozilla/firefox
- Source
- security@mozilla.org
References
- https://bugzilla.mozilla.org/show_bug.cgi?id=2022554Issue Tracking, Permissions Required
- https://www.mozilla.org/security/advisories/mfsa2026-25/Vendor Advisory
- 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
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.