CVE-2026-92068
published 2026-09-15CVE-2026-92068: Site isolation issue in the Reader Mode component. This vulnerability was fixed in Firefox 156, Firefox ESR 153.3, Thunderbird 156, and Thunderbird 153.3.
PriorityP425medium5.4CVSS 3.1
AVNACLPRNUIRSUCLILAN
EPSS
0.10%
1.0th percentile
Site isolation issue in the Reader Mode component. This vulnerability was fixed in Firefox 156, Firefox ESR 153.3, Thunderbird 156, and Thunderbird 153.3.
Affected
8 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| mozilla | firefox | < Firefox 156 | Firefox 156 |
| mozilla | firefox | < 153.3.0 | 153.3.0 |
| mozilla | firefox | >= 154.0.0 < 156.0.0 | 156.0.0 |
| mozilla | firefox_esr | < Firefox ESR 153.3 | Firefox ESR 153.3 |
| mozilla | thunderbird | < Thunderbird 153.3 | Thunderbird 153.3 |
| mozilla | thunderbird | < Thunderbird 156 | Thunderbird 156 |
| mozilla | thunderbird | < 153.3.0 | 153.3.0 |
| mozilla | thunderbird | >= 154.0 < 156.0 | 156.0 |
CVSS provenance
nvdv3.15.4MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N
vendor_redhat3.4LOW
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Red Hat
firefox: Site isolation issue in the Reader Mode component
vendor_redhat·2026-09-15·CVSS 3.4
CVE-2026-92068 [LOW] CWE-653 firefox: Site isolation issue in the Reader Mode component
firefox: Site isolation issue in the Reader Mode component
Site isolation issue in the Reader Mode component. This vulnerability was fixed in Firefox 156, Firefox ESR 153.3, Thunderbird 156, and Thunderbird 153.3.
A flaw was found in Firefox. The Mozilla Foundation's Security Advisory describes the following issue:
Site isolation issue in the Reader Mode 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: fir
Mozilla
Mozilla Foundation Security Advisory 2026-93: CVE-2026-92068
vendor_mozilla
CVE-2026-92068 Mozilla Foundation Security Advisory 2026-93: CVE-2026-92068
Mozilla Foundation Security Advisory 2026-93
CVE: CVE-2026-92068
Product: Firefox ESR
Impact: low
Fixed in: Firefox ESR 153.3
Mozilla
Mozilla Foundation Security Advisory 2026-90: CVE-2026-92068
vendor_mozilla
CVE-2026-92068 Mozilla Foundation Security Advisory 2026-90: CVE-2026-92068
Mozilla Foundation Security Advisory 2026-90
CVE: CVE-2026-92068
Product: Firefox
Impact: low
Fixed in: Firefox 156
Mozilla
Mozilla Foundation Security Advisory 2026-96: CVE-2026-92068
vendor_mozilla
CVE-2026-92068 Mozilla Foundation Security Advisory 2026-96: CVE-2026-92068
Mozilla Foundation Security Advisory 2026-96
CVE: CVE-2026-92068
Product: Thunderbird
Impact: low
Fixed in: Thunderbird 153.3
Mozilla
Mozilla Foundation Security Advisory 2026-94: CVE-2026-92068
vendor_mozilla
CVE-2026-92068 Mozilla Foundation Security Advisory 2026-94: CVE-2026-92068
Mozilla Foundation Security Advisory 2026-94
CVE: CVE-2026-92068
Product: Thunderbird
Impact: low
Fixed in: Thunderbird 156
GHSA
Site isolation issue in the Reader Mode component.
ghsa_unreviewed·2026-09-15
CVE-2026-92068 Site isolation issue in the Reader Mode component.
Site isolation issue in the Reader Mode component. This vulnerability was fixed in Firefox 156 and Firefox ESR 153.3.
No detection rules found.
No public exploits indexed.
2026-09-15
Published