CVE-2026-92038
published 2026-09-15CVE-2026-92038: Mitigation bypass in the Remote Settings Client component. This vulnerability was fixed in Firefox 156, Firefox ESR 153.3, Thunderbird 156, and Thunderbird…
PriorityP352critical9.1CVSS 3.1
AVNACLPRNUINSUCHIHAN
EPSS
0.32%
23.2th percentile
Mitigation bypass in the Remote Settings Client 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 156 | Thunderbird 156 |
| mozilla | thunderbird | < Thunderbird 153.3 | Thunderbird 153.3 |
| mozilla | thunderbird | < 153.3.0 | 153.3.0 |
| mozilla | thunderbird | >= 154.0 < 156.0 | 156.0 |
CVSS provenance
nvdv3.19.1CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
vendor_redhat7.5HIGH
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Red Hat
firefox: thunderbird: Mitigation bypass in the Remote Settings Client component
vendor_redhat·2026-09-15·CVSS 7.5
CVE-2026-92038 [HIGH] CWE-807 firefox: thunderbird: Mitigation bypass in the Remote Settings Client component
firefox: thunderbird: Mitigation bypass in the Remote Settings Client component
Mitigation bypass in the Remote Settings Client component. This vulnerability was fixed in Firefox 156, Firefox ESR 153.3, Thunderbird 156, and Thunderbird 153.3.
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue:
Mitigation bypass in the Remote Settings Client 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
Mozilla
Mozilla Foundation Security Advisory 2026-93: CVE-2026-92038
vendor_mozilla
CVE-2026-92038 Mozilla Foundation Security Advisory 2026-93: CVE-2026-92038
Mozilla Foundation Security Advisory 2026-93
CVE: CVE-2026-92038
Product: Firefox ESR
Impact: low
Fixed in: Firefox ESR 153.3
Mozilla
Mozilla Foundation Security Advisory 2026-94: CVE-2026-92038
vendor_mozilla
CVE-2026-92038 Mozilla Foundation Security Advisory 2026-94: CVE-2026-92038
Mozilla Foundation Security Advisory 2026-94
CVE: CVE-2026-92038
Product: Thunderbird
Impact: low
Fixed in: Thunderbird 156
Mozilla
Mozilla Foundation Security Advisory 2026-96: CVE-2026-92038
vendor_mozilla
CVE-2026-92038 Mozilla Foundation Security Advisory 2026-96: CVE-2026-92038
Mozilla Foundation Security Advisory 2026-96
CVE: CVE-2026-92038
Product: Thunderbird
Impact: low
Fixed in: Thunderbird 153.3
Mozilla
Mozilla Foundation Security Advisory 2026-90: CVE-2026-92038
vendor_mozilla
CVE-2026-92038 Mozilla Foundation Security Advisory 2026-90: CVE-2026-92038
Mozilla Foundation Security Advisory 2026-90
CVE: CVE-2026-92038
Product: Firefox
Impact: low
Fixed in: Firefox 156
GHSA
Mitigation bypass in the Remote Settings Client component.
ghsa_unreviewed·2026-09-15
CVE-2026-92038 Mitigation bypass in the Remote Settings Client component.
Mitigation bypass in the Remote Settings Client component. This vulnerability was fixed in Firefox 156 and Firefox ESR 153.3.
No detection rules found.
No public exploits indexed.
Hackernews
⚡ Weekly Recap: Cisco 0-Day, AI Agent RCE, ClickFix Attacks, ClickFix Surge, and Browser Hijacks
blogs_hackernews·2026-09-21·CVSS 10.0
CVE-2026-76460 [CRITICAL] ⚡ Weekly Recap: Cisco 0-Day, AI Agent RCE, ClickFix Attacks, ClickFix Surge, and Browser Hijacks
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## ⚡ Weekly Recap: Cisco 0-Day, AI Agent RCE, ClickFix Attacks, ClickFix Surge, and Browser Hijacks
A browser. A plugin. A package. A login screen. Normal stuff. That is basically the problem this week.
The trouble keeps showing up inside things people already trust: code that takes a bad turn, old payloads coming back, exposed systems, weak checks, fake fixes, and attack paths that look almost too easy. Even the research side is getting messy, with more findings, more automation, and not always more clarity.
Nothing here needs much drama. Just a lot of small doors left open. Here’s what happened.
## ⚡ Threat of the Week
C
Bugzilla
CVE-2026-92038 firefox: thunderbird: Mitigation bypass in the Remote Settings Client component
bugzilla·2026-09-15
CVE-2026-92038 [HIGH] CVE-2026-92038 firefox: thunderbird: Mitigation bypass in the Remote Settings Client component
CVE-2026-92038 firefox: thunderbird: Mitigation bypass in the Remote Settings Client component
Mitigation bypass in the Remote Settings Client component. This vulnerability was fixed in Firefox 156 and Firefox ESR 153.3.
2026-09-15
Published