CVE-2026-74968
published 2026-08-18CVE-2026-74968: Site isolation issue in the Graphics: WebRender component. This vulnerability was fixed in Firefox 154, Firefox ESR 153.1, Thunderbird 154, and Thunderbird…
PriorityP425medium5.4CVSS 3.1
AVNACLPRNUIRSUCLILAN
EPSS
0.10%
1.2th percentile
Site isolation issue in the Graphics: WebRender component. This vulnerability was fixed in Firefox 154, Firefox ESR 153.1, Thunderbird 154, and Thunderbird 153.1.
Affected
8 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| mozilla | firefox | < Firefox 154 | Firefox 154 |
| mozilla | firefox | < 153.1.0 | 153.1.0 |
| mozilla | firefox | < 154.0.0 | 154.0.0 |
| mozilla | firefox_esr | < Firefox ESR 153.1 | Firefox ESR 153.1 |
| mozilla | thunderbird | < Thunderbird 154 | Thunderbird 154 |
| mozilla | thunderbird | < Thunderbird 153.1 | Thunderbird 153.1 |
| mozilla | thunderbird | < 153.1.0 | 153.1.0 |
| mozilla | thunderbird | < 154.0 | 154.0 |
CVSS provenance
nvdv3.15.4MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N
vendor_redhat5.4MEDIUM
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Red Hat
firefox: thunderbird: Site isolation issue in the Graphics: WebRender component
vendor_redhat·2026-08-18·CVSS 5.4
CVE-2026-74968 [MEDIUM] CWE-501 firefox: thunderbird: Site isolation issue in the Graphics: WebRender component
firefox: thunderbird: Site isolation issue in the Graphics: WebRender component
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue:
Site isolation issue 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) - Not affected
Package: rhel10/firefox-flatpak (Red Hat Enterprise Linux 10) - Not affected
Package: rhel10/thunderbird-flatpak (Red Hat Enterprise Linux 10) - Not affected
Package: thunderbird (Red Hat Enterprise Linux 10) - Not affected
Package: firefox (Red Hat Enterprise Linux 6) - Not affected
Package: thunderbird (Red Hat Enterprise Linux 6) - Not affec
Mozilla
Mozilla Foundation Security Advisory 2026-78: CVE-2026-74968
vendor_mozilla
CVE-2026-74968 Mozilla Foundation Security Advisory 2026-78: CVE-2026-74968
Mozilla Foundation Security Advisory 2026-78
CVE: CVE-2026-74968
Product: Thunderbird
Impact: high
Fixed in: Thunderbird 154
Mozilla
Mozilla Foundation Security Advisory 2026-77: CVE-2026-74968
vendor_mozilla
CVE-2026-74968 Mozilla Foundation Security Advisory 2026-77: CVE-2026-74968
Mozilla Foundation Security Advisory 2026-77
CVE: CVE-2026-74968
Product: Firefox ESR
Impact: high
Fixed in: Firefox ESR 153.1
Mozilla
Mozilla Foundation Security Advisory 2026-80: CVE-2026-74968
vendor_mozilla
CVE-2026-74968 Mozilla Foundation Security Advisory 2026-80: CVE-2026-74968
Mozilla Foundation Security Advisory 2026-80
CVE: CVE-2026-74968
Product: Thunderbird
Impact: high
Fixed in: Thunderbird 153.1
Mozilla
Mozilla Foundation Security Advisory 2026-74: CVE-2026-74968
vendor_mozilla
CVE-2026-74968 Mozilla Foundation Security Advisory 2026-74: CVE-2026-74968
Mozilla Foundation Security Advisory 2026-74
CVE: CVE-2026-74968
Product: Firefox
Impact: high
Fixed in: Firefox 154
GHSA
Site isolation issue in the Graphics: WebRender component.
ghsa_unreviewed·2026-08-18
CVE-2026-74968 [MEDIUM] CWE-346 Site isolation issue in the Graphics: WebRender component.
Site isolation issue in the Graphics: WebRender component. This vulnerability was fixed in Firefox 154 and Firefox ESR 153.1.
No detection rules found.
No public exploits indexed.
2026-08-18
Published