CVE-2026-84129

CRITICAL9.8

Published 2026-09-01 · Updated 2026-09-02 · Source security@mozilla.org

Description

Site isolation issue in the DOM: Navigation component. This vulnerability was fixed in Firefox 155, Firefox ESR 153.2, Thunderbird 155, and Thunderbird 153.2.

CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CWE-346

References

View on NVD

Related CVEs

Same severity, most recent

CVE-2026-53611
Looking Glass is a modern, stateless network-diagnostic platform — a single self-contained Go binary that fronts a fleet of routers over SSH and exposes ping / traceroute / BGP lookups through a gRPC (ConnectRPC) API, an embedded SvelteKit web UI, and a lg-cli client. Prior to version 1.3.5, there is an OS Command Injection vulnerability resulting from an unanchored regular expression in the input validation layer. This issue has been patched in version 1.3.5.
2026-09-02 · score 9.8
CVE-2026-77009
The WatchMan-Site7 WordPress plugin through 4.2.0 does not restrict access to its debugging console, which executes user-supplied PHP code, allowing any authenticated user, such as a subscriber, to run arbitrary code on the server.
2026-09-02 · score 9.9
CVE-2026-4357
The Embed HTML5 Game WordPress plugin through 1.3 does not properly restrict who can upload files via the plugin, as well as what can be uploaded, making it possible for unauthenticated attackers to upload PHP backdoors on affected sites.
2026-09-02 · score 10.0
CVE-2025-9314
The Developer Tools WordPress plugin through 1.1.3 contains an unauthenticated arbitrary file upload vulnerability in the bundled SWFUpload component
2026-09-02 · score 9.8
CVE-2026-84803
SiYuan before v3.8.2 contains a stored cross-site scripting vulnerability in asset serving due to an incomplete extension blocklist that misses script-capable file types. Attackers can upload files with extensions like .xht, .ehtml, .xsl, .xbl, or .rdf that resolve to executable media types and execute JavaScript to steal API tokens and compromise workspaces.
2026-09-02 · score 9.0