CVE-2026-12295
published 2026-06-16CVE-2026-12295: Sandbox escape in the DOM: Navigation component. This vulnerability was fixed in Firefox 152, Firefox ESR 140.12, Firefox ESR 115.37, Thunderbird 152, and…
PriorityP347critical9.6CVSS 3.1
AVNACLPRNUIRSCCHIHAH
EPSS
0.39%
31.4th percentile
Sandbox escape in the DOM: Navigation 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 | < 152.0.0 | 152.0.0 |
| mozilla | firefox | — | — |
| mozilla | firefox | >= 128.0 < 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 152 | Thunderbird 152 |
| mozilla | thunderbird | < Thunderbird 140.12 | Thunderbird 140.12 |
| mozilla | thunderbird | < 140.12.0 | 140.12.0 |
| mozilla | thunderbird | < 152.0.0 | 152.0.0 |
| mozilla | thunderbird | — | — |
| rhel10 | firefox-flatpak | — | — |
| rhel10 | thunderbird-flatpak | — | — |
CVSS provenance
nvdv3.19.6CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
vendor_redhat7.5HIGH
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Red Hat
firefox: thunderbird: Sandbox escape in the DOM: Navigation component
vendor_redhat·2026-06-16·CVSS 7.5
CVE-2026-12295 [HIGH] CWE-653 firefox: thunderbird: Sandbox escape in the DOM: Navigation component
firefox: thunderbird: Sandbox escape in the DOM: Navigation component
Sandbox escape in the DOM: Navigation 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:
Sandbox escape in the DOM: Navigation 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: thunderbird (Red Hat Enterprise Linux
Mozilla
Mozilla Foundation Security Advisory 2026-59: CVE-2026-12295
vendor_mozilla
CVE-2026-12295 Mozilla Foundation Security Advisory 2026-59: CVE-2026-12295
Mozilla Foundation Security Advisory 2026-59
CVE: CVE-2026-12295
Product: Firefox ESR
Impact: high
Fixed in: Firefox ESR 115.37
Mozilla
Mozilla Foundation Security Advisory 2026-57: CVE-2026-12295
vendor_mozilla
CVE-2026-12295 Mozilla Foundation Security Advisory 2026-57: CVE-2026-12295
Mozilla Foundation Security Advisory 2026-57
CVE: CVE-2026-12295
Product: Firefox
Impact: high
Fixed in: Firefox 152
Mozilla
Mozilla Foundation Security Advisory 2026-58: CVE-2026-12295
vendor_mozilla
CVE-2026-12295 Mozilla Foundation Security Advisory 2026-58: CVE-2026-12295
Mozilla Foundation Security Advisory 2026-58
CVE: CVE-2026-12295
Product: Firefox ESR
Impact: high
Fixed in: Firefox ESR 140.12
Mozilla
Mozilla Foundation Security Advisory 2026-60: CVE-2026-12295
vendor_mozilla
CVE-2026-12295 Mozilla Foundation Security Advisory 2026-60: CVE-2026-12295
Mozilla Foundation Security Advisory 2026-60
CVE: CVE-2026-12295
Product: Thunderbird
Impact: high
Fixed in: Thunderbird 152
Mozilla
Mozilla Foundation Security Advisory 2026-61: CVE-2026-12295
vendor_mozilla
CVE-2026-12295 Mozilla Foundation Security Advisory 2026-61: CVE-2026-12295
Mozilla Foundation Security Advisory 2026-61
CVE: CVE-2026-12295
Product: Thunderbird
Impact: high
Fixed in: Thunderbird 140.12
VulDB
Mozilla Firefox up to 151 Navigation sandbox (Nessus ID 321490 / WID-SEC-2026-1959)
vuldb·2026-07-03·CVSS 9.6
CVE-2026-12295 [CRITICAL] Mozilla Firefox up to 151 Navigation sandbox (Nessus ID 321490 / WID-SEC-2026-1959)
A vulnerability was found in Mozilla Firefox up to 151 and classified as critical. This issue affects some unknown processing of the component Navigation. The manipulation results in sandbox issue.
This vulnerability was named CVE-2026-12295. The attack may be performed from remote. There is no available exploit.
It is suggested to upgrade the affected component.
GHSA
Sandbox escape in the DOM: Navigation component.
ghsa_unreviewed·2026-06-16
CVE-2026-12295 Sandbox escape in the DOM: Navigation component.
Sandbox escape in the DOM: Navigation 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=2040160https://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/security/cve/CVE-2026-12295https://bugzilla.redhat.com/show_bug.cgi?id=2489226https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-12295.json
2026-06-16
Published