CVE-2026-12289
published 2026-06-16CVE-2026-12289: Privilege escalation in the Graphics: WebRender component. This vulnerability was fixed in Firefox 152, Firefox ESR 140.12, Firefox ESR 115.37, Thunderbird…
PriorityP347high8.8CVSS 3.1
AVNACLPRNUIRSUCHIHAH
EPSS
0.40%
32.1th percentile
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.
Affected
14 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| mozilla | firefox | < Firefox 152 | Firefox 152 |
| mozilla | firefox | < 115.37.0 | 115.37.0 |
| mozilla | firefox | < 152.0 | 152.0 |
| mozilla | firefox | — | — |
| mozilla | firefox | >= 140.0 < 140.12.0 | 140.12.0 |
| mozilla | firefox_esr | < Firefox ESR 115.37 | Firefox ESR 115.37 |
| mozilla | firefox_esr | < Firefox ESR 140.12 | Firefox ESR 140.12 |
| mozilla | thunderbird | < Thunderbird 140.12 | Thunderbird 140.12 |
| mozilla | thunderbird | < Thunderbird 152 | Thunderbird 152 |
| mozilla | thunderbird | < 152.0.0 | 152.0.0 |
| mozilla | thunderbird | — | — |
| mozilla | thunderbird | >= 140.0 < 140.12.0 | 140.12.0 |
| rhel10 | firefox-flatpak | — | — |
| rhel10 | thunderbird-flatpak | — | — |
CVSS provenance
nvdv3.18.8HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
vendor_redhat8.8HIGH
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Red Hat
firefox: thunderbird: Privilege escalation in the Graphics: WebRender component
vendor_redhat·2026-06-16·CVSS 8.8
CVE-2026-12289 [HIGH] CWE-266 firefox: thunderbird: Privilege escalation in the Graphics: WebRender component
firefox: thunderbird: Privilege escalation in the Graphics: WebRender component
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.
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue:
Privilege escalation in the Graphics: WebRender component
Statement: Red Hat Product Security rates the severity of this flaw as determined by the Mozilla Foundation Security Advisory.
Package: firefox (Red Hat Enterprise Linux 10) - Affected
Package: rhel10/firefox-flatpak (Red Hat Enterprise Linux 10) - Affected
Package: rhel10/thunderbird-flatpak (Red Hat Enterprise Linux 10) - Affected
Package: thunder
Mozilla
Mozilla Foundation Security Advisory 2026-59: CVE-2026-12289
vendor_mozilla·CVSS 8.8
CVE-2026-12289 [HIGH] Mozilla Foundation Security Advisory 2026-59: CVE-2026-12289
Mozilla Foundation Security Advisory 2026-59
CVE: CVE-2026-12289
Product: Firefox ESR
Impact: high
Fixed in: Firefox ESR 115.37
Mozilla
Mozilla Foundation Security Advisory 2026-61: CVE-2026-12289
vendor_mozilla·CVSS 8.8
CVE-2026-12289 [HIGH] Mozilla Foundation Security Advisory 2026-61: CVE-2026-12289
Mozilla Foundation Security Advisory 2026-61
CVE: CVE-2026-12289
Product: Thunderbird
Impact: high
Fixed in: Thunderbird 140.12
Mozilla
Mozilla Foundation Security Advisory 2026-60: CVE-2026-12289
vendor_mozilla·CVSS 8.8
CVE-2026-12289 [HIGH] Mozilla Foundation Security Advisory 2026-60: CVE-2026-12289
Mozilla Foundation Security Advisory 2026-60
CVE: CVE-2026-12289
Product: Thunderbird
Impact: high
Fixed in: Thunderbird 152
Mozilla
Mozilla Foundation Security Advisory 2026-57: CVE-2026-12289
vendor_mozilla·CVSS 8.8
CVE-2026-12289 [HIGH] Mozilla Foundation Security Advisory 2026-57: CVE-2026-12289
Mozilla Foundation Security Advisory 2026-57
CVE: CVE-2026-12289
Product: Firefox
Impact: high
Fixed in: Firefox 152
Mozilla
Mozilla Foundation Security Advisory 2026-58: CVE-2026-12289
vendor_mozilla·CVSS 8.8
CVE-2026-12289 [HIGH] Mozilla Foundation Security Advisory 2026-58: CVE-2026-12289
Mozilla Foundation Security Advisory 2026-58
CVE: CVE-2026-12289
Product: Firefox ESR
Impact: high
Fixed in: Firefox ESR 140.12
VulDB
Mozilla Firefox up to 151 WebRender Remote Code Execution (Nessus ID 321204)
vuldb·2026-06-17·CVSS 8.8
CVE-2026-12289 [HIGH] Mozilla Firefox up to 151 WebRender Remote Code Execution (Nessus ID 321204)
A vulnerability described as critical has been identified in Mozilla Firefox up to 151. This impacts an unknown function of the component WebRender. The manipulation results in Remote Code Execution.
This vulnerability is reported as CVE-2026-12289. The attack can be launched remotely. No exploit exists.
Upgrading the affected component is recommended.
GHSA
Privilege escalation in the Graphics: WebRender component.
ghsa_unreviewed·2026-06-16
CVE-2026-12289 [HIGH] CWE-269 Privilege escalation in the Graphics: WebRender component.
Privilege escalation in the Graphics: WebRender component. This vulnerability was fixed in Firefox 152, Firefox ESR 140.12, and Firefox ESR 115.37.
No detection rules found.
No public exploits indexed.
https://bugzilla.mozilla.org/show_bug.cgi?id=2023443https://www.mozilla.org/security/advisories/mfsa2026-57/https://www.mozilla.org/security/advisories/mfsa2026-58/https://www.mozilla.org/security/advisories/mfsa2026-59/https://www.mozilla.org/security/advisories/mfsa2026-60/https://www.mozilla.org/security/advisories/mfsa2026-61/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/errata/RHSA-2026:36100https://access.redhat.com/errata/RHSA-2026:36101https://access.redhat.com/errata/RHSA-2026:36102https://access.redhat.com/errata/RHSA-2026:36103https://access.redhat.com/errata/RHSA-2026:37210https://access.redhat.com/errata/RHSA-2026:37391https://access.redhat.com/errata/RHSA-2026:38506https://access.redhat.com/errata/RHSA-2026:38750https://access.redhat.com/errata/RHSA-2026:38751https://access.redhat.com/errata/RHSA-2026:38753https://access.redhat.com/errata/RHSA-2026:39011https://access.redhat.com/errata/RHSA-2026:39141https://access.redhat.com/errata/RHSA-2026:39142https://access.redhat.com/errata/RHSA-2026:39428https://access.redhat.com/errata/RHSA-2026:39706https://access.redhat.com/security/cve/CVE-2026-12289https://bugzilla.redhat.com/show_bug.cgi?id=2489229https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-12289.json
2026-06-16
Published