CVE-2026-84136
published 2026-09-01CVE-2026-84136: Other issue in the DOM: Navigation component. This vulnerability was fixed in Firefox 155, Firefox ESR 153.2, Thunderbird 155, and Thunderbird 153.2.
PriorityP427medium6.1CVSS 3.1
AVNACLPRNUIRSCCLILAN
EPSS
0.20%
9.5th percentile
Other issue in the DOM: Navigation component. This vulnerability was fixed in Firefox 155, Firefox ESR 153.2, Thunderbird 155, and Thunderbird 153.2.
Affected
8 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| mozilla | firefox | < Firefox 155 | Firefox 155 |
| mozilla | firefox | < 153.2.0 | 153.2.0 |
| mozilla | firefox | >= 154.0.0 < 155.0.0 | 155.0.0 |
| mozilla | firefox_esr | < Firefox ESR 153.2 | Firefox ESR 153.2 |
| mozilla | thunderbird | < Thunderbird 155 | Thunderbird 155 |
| mozilla | thunderbird | < Thunderbird 153.2 | Thunderbird 153.2 |
| mozilla | thunderbird | < 153.2.0 | 153.2.0 |
| mozilla | thunderbird | >= 154.0 < 155.0 | 155.0 |
CVSS provenance
nvdv3.16.1MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
vendor_redhat6.1MEDIUM
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VulDB
Mozilla Firefox up to 153.1/154 Navigation Remote Code Execution (Nessus ID 342301)
vuldb·2026-09-03
CVE-2026-84136 [CRITICAL] Mozilla Firefox up to 153.1/154 Navigation Remote Code Execution (Nessus ID 342301)
A vulnerability labeled as critical has been found in Mozilla Firefox up to 153.1/154. The impacted element is an unknown function of the component Navigation. Executing a manipulation can lead to Remote Code Execution.
The identification of this vulnerability is CVE-2026-84136. The attack may be launched remotely. There is no exploit available.
The affected component should be upgraded.
GHSA
Other issue in the DOM: Navigation component.
ghsa_unreviewed·2026-09-01
CVE-2026-84136 Other issue in the DOM: Navigation component.
Other issue in the DOM: Navigation component. This vulnerability was fixed in Firefox 155 and Firefox ESR 153.2.
Red Hat
firefox: thunderbird: Other issue in the DOM: Navigation component
vendor_redhat·2026-09-01·CVSS 6.1
CVE-2026-84136 [MEDIUM] CWE-368 firefox: thunderbird: Other issue in the DOM: Navigation component
firefox: thunderbird: Other issue in the DOM: Navigation component
Other issue in the DOM: Navigation component. This vulnerability was fixed in Firefox 155, Firefox ESR 153.2, Thunderbird 155, and Thunderbird 153.2.
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue:
Other issue 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) - 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
Mozilla
Mozilla Foundation Security Advisory 2026-82: CVE-2026-84136
vendor_mozilla
CVE-2026-84136 Mozilla Foundation Security Advisory 2026-82: CVE-2026-84136
Mozilla Foundation Security Advisory 2026-82
CVE: CVE-2026-84136
Product: Firefox
Impact: high
Fixed in: Firefox 155
Mozilla
Mozilla Foundation Security Advisory 2026-86: CVE-2026-84136
vendor_mozilla
CVE-2026-84136 Mozilla Foundation Security Advisory 2026-86: CVE-2026-84136
Mozilla Foundation Security Advisory 2026-86
CVE: CVE-2026-84136
Product: Thunderbird
Impact: high
Fixed in: Thunderbird 155
Mozilla
Mozilla Foundation Security Advisory 2026-85: CVE-2026-84136
vendor_mozilla
CVE-2026-84136 Mozilla Foundation Security Advisory 2026-85: CVE-2026-84136
Mozilla Foundation Security Advisory 2026-85
CVE: CVE-2026-84136
Product: Firefox ESR
Impact: high
Fixed in: Firefox ESR 153.2
Mozilla
Mozilla Foundation Security Advisory 2026-88: CVE-2026-84136
vendor_mozilla
CVE-2026-84136 Mozilla Foundation Security Advisory 2026-88: CVE-2026-84136
Mozilla Foundation Security Advisory 2026-88
CVE: CVE-2026-84136
Product: Thunderbird
Impact: high
Fixed in: Thunderbird 153.2
No detection rules found.
No public exploits indexed.
2026-09-01
Published