CVE-2026-8952
published 2026-05-19CVE-2026-8952: Privilege escalation in the Application Update component. This vulnerability was fixed in Firefox 151 and Thunderbird 151.
PriorityP345high8.8CVSS 3.1
AVNACLPRNUIRSUCHIHAH
EPSS
0.37%
29.9th percentile
Privilege escalation in the Application Update component. This vulnerability was fixed in Firefox 151 and Thunderbird 151.
Affected
4 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| mozilla | firefox | < Firefox 151 | Firefox 151 |
| mozilla | firefox | < 151.0.0 | 151.0.0 |
| mozilla | thunderbird | < Thunderbird 151 | Thunderbird 151 |
| mozilla | thunderbird | < 151.0.0 | 151.0.0 |
CVSS provenance
nvdv3.18.8HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
vendor_redhat8.8HIGH
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GHSA
GHSA-hrqc-vwff-62mj: Privilege escalation in the Application Update component
ghsa_unreviewed·2026-05-19
CVE-2026-8952 [MEDIUM] CWE-269 GHSA-hrqc-vwff-62mj: Privilege escalation in the Application Update component
Privilege escalation in the Application Update component. This vulnerability was fixed in Firefox 151.
VulDB
Mozilla Firefox up to 150 Application Update privilege escalation (EUVD-2026-30902)
vuldb·2026-05-19·CVSS 6.5
CVE-2026-8952 [MEDIUM] Mozilla Firefox up to 150 Application Update privilege escalation (EUVD-2026-30902)
A vulnerability labeled as problematic has been found in Mozilla Firefox up to 150. The impacted element is an unknown function of the component Application Update. The manipulation results in privilege escalation.
This vulnerability was named CVE-2026-8952. The attack needs to be approached within the local network. There is no available exploit.
The affected component should be upgraded.
Red Hat
firefox: thunderbird: Privilege escalation in the Application Update component
vendor_redhat·2026-05-19·CVSS 8.8
CVE-2026-8952 [HIGH] CWE-266 firefox: thunderbird: Privilege escalation in the Application Update component
firefox: thunderbird: Privilege escalation in the Application Update component
Privilege escalation in the Application Update component. This vulnerability was fixed in Firefox 151 and Thunderbird 151.
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue:
Privilege escalation in the Application Update 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
P
Mozilla
Mozilla Foundation Security Advisory 2026-50: CVE-2026-8952
vendor_mozilla·CVSS 6.5
CVE-2026-8952 [MEDIUM] Mozilla Foundation Security Advisory 2026-50: CVE-2026-8952
Mozilla Foundation Security Advisory 2026-50
CVE: CVE-2026-8952
Product: Thunderbird
Impact: high
Fixed in: Thunderbird 151
Mozilla
Mozilla Foundation Security Advisory 2026-46: CVE-2026-8952
vendor_mozilla·CVSS 6.5
CVE-2026-8952 [MEDIUM] Mozilla Foundation Security Advisory 2026-46: CVE-2026-8952
Mozilla Foundation Security Advisory 2026-46
CVE: CVE-2026-8952
Product: Firefox
Impact: high
Fixed in: Firefox 151
No detection rules found.
No public exploits indexed.
2026-05-19
Published