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CVE-2026-12289

Privilege escalation in the Graphics: WebRender component

CVSS 8.8 HIGHEPSS 0.3%CWE-266CWE-269
Vexday Risk Score
21Low
SSVC decision (CISA)
Track
No exploitation signal → monitor
CVSS 8.8EPSS 0.3%KEV nãoPoC —Nuclei —Metasploit —Patch referenciado
Lifecycle
16 Jun 2026Published on NVD
Recommendation: Monitor — no exploitation signal at the moment.
Privilege escalation in the Graphics: WebRender component. This vulnerability was fixed in Firefox 152, Firefox ESR 140.12, Firefox ESR 115.37, Thunderbird 152, and Thunderbird 140.12.
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Affected products
Mozilla · FirefoxMozilla · Thunderbird

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References
https://access.redhat.com/errata/RHSA-2026:27717https://access.redhat.com/errata/RHSA-2026:27733https://access.redhat.com/errata/RHSA-2026:27734https://access.redhat.com/errata/RHSA-2026:29940https://access.redhat.com/errata/RHSA-2026:30846https://access.redhat.com/errata/RHSA-2026:33445https://access.redhat.com/security/cve/CVE-2026-12289https://bugzilla.mozilla.org/show_bug.cgi?id=2023443https://bugzilla.redhat.com/show_bug.cgi?id=2489229https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-12289.jsonhttps://www.mozilla.org/security/advisories/mfsa2026-57/https://www.mozilla.org/security/advisories/mfsa2026-58/