CVE-2026-92050
published 2026-09-15CVE-2026-92050: Sandbox escape due to race condition in the XPConnect component. This vulnerability was fixed in Firefox 156 and Thunderbird 156.
PriorityP348critical9.1CVSS 3.1
AVNACLPRNUINSUCNIHAH
EPSS
0.41%
33.3th percentile
Sandbox escape due to race condition in the XPConnect component. This vulnerability was fixed in Firefox 156 and Thunderbird 156.
Affected
4 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| mozilla | firefox | < Firefox 156 | Firefox 156 |
| mozilla | firefox | < 156.0.0 | 156.0.0 |
| mozilla | thunderbird | < Thunderbird 156 | Thunderbird 156 |
| mozilla | thunderbird | < 156.0 | 156.0 |
CVSS provenance
nvdv3.19.1CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
vendor_redhat6.1MEDIUM
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Red Hat
firefox: thunderbird: Sandbox escape due to race condition in the XPConnect component
vendor_redhat·2026-09-15·CVSS 6.1
CVE-2026-92050 [MEDIUM] CWE-368 firefox: thunderbird: Sandbox escape due to race condition in the XPConnect component
firefox: thunderbird: Sandbox escape due to race condition in the XPConnect component
Sandbox escape due to race condition in the XPConnect component. This vulnerability was fixed in Firefox 156 and Thunderbird 156.
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue:
Sandbox escape due to race condition in the XPConnect 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
Mozilla
Mozilla Foundation Security Advisory 2026-90: CVE-2026-92050
vendor_mozilla
CVE-2026-92050 Mozilla Foundation Security Advisory 2026-90: CVE-2026-92050
Mozilla Foundation Security Advisory 2026-90
CVE: CVE-2026-92050
Product: Firefox
Impact: low
Fixed in: Firefox 156
Mozilla
Mozilla Foundation Security Advisory 2026-94: CVE-2026-92050
vendor_mozilla
CVE-2026-92050 Mozilla Foundation Security Advisory 2026-94: CVE-2026-92050
Mozilla Foundation Security Advisory 2026-94
CVE: CVE-2026-92050
Product: Thunderbird
Impact: low
Fixed in: Thunderbird 156
GHSA
Sandbox escape due to race condition in the XPConnect component.
ghsa_unreviewed·2026-09-15
CVE-2026-92050 Sandbox escape due to race condition in the XPConnect component.
Sandbox escape due to race condition in the XPConnect component. This vulnerability was fixed in Firefox 156.
No detection rules found.
No public exploits indexed.
2026-09-15
Published