CVE-2026-4684
Race condition, use-after-free in the Graphics: WebRender component
- State
- Published
- Severity
- 7.5 High
- Published
- Mar 24, 2026
- Updated
- Jul 15, 2026
- Reserved
- Mar 23, 2026
Description
Race condition, use-after-free in the Graphics: WebRender component. This vulnerability was fixed in Firefox 149, Firefox ESR 115.34, Firefox ESR 140.9, Thunderbird 149, and Thunderbird 140.9.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 7.5 High | CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H | CISA-ADP |
| 3.1 | 7.5 High | CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H | redhat-SADP |
Weaknesses
Affected Products
| Product | Versions |
|---|---|
FirefoxMozilla |
|
ThunderbirdMozilla |
|
References
- https://bugzilla.mozilla.org/show_bug.cgi?id=2011129
- https://www.mozilla.org/security/advisories/mfsa2026-20/
- https://www.mozilla.org/security/advisories/mfsa2026-21/
- https://www.mozilla.org/security/advisories/mfsa2026-22/
- https://www.mozilla.org/security/advisories/mfsa2026-23/
- https://www.mozilla.org/security/advisories/mfsa2026-24/
- https://access.redhat.com/security/cve/CVE-2026-4684vdb-entry
- RHBZ#2450721issue-tracking
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-4684.json
- https://access.redhat.com/errata/RHSA-2026:8427vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:7843vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:8315vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:5931vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:6342vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:5932vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:6917vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:7840vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:8285vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:7858vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:8850vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:7842vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:8289vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:7838vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:8288vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:7839vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:8286vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:7841vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:8287vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:7845vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:8290vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:7837vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:8284vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:5930vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:6188vendor-advisory
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