CVE-2026-6769
published 2026-04-21CVE-2026-6769: Privilege escalation in the Debugger component. This vulnerability was fixed in Firefox 150, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10.
PriorityP345high8.8CVSS 3.1
AVNACLPRNUIRSUCHIHAH
EPSS
0.23%
13.3th percentile
Privilege escalation in the Debugger component. This vulnerability was fixed in Firefox 150, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10.
Affected
9 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| mozilla | firefox | < Firefox 150 | Firefox 150 |
| mozilla | firefox | < 140.10.0 | 140.10.0 |
| mozilla | firefox | < 150.0 | 150.0 |
| mozilla | firefox | — | — |
| mozilla | firefox_esr | < Firefox ESR 140.10 | Firefox ESR 140.10 |
| mozilla | thunderbird | < Thunderbird 140.10 | Thunderbird 140.10 |
| mozilla | thunderbird | < Thunderbird 150 | Thunderbird 150 |
| mozilla | thunderbird | < 140.10.0 | 140.10.0 |
| rhel10 | firefox-flatpak | — | — |
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-35h9-jh69-pc24: Privilege escalation in the Debugger component
ghsa_unreviewed·2026-04-21
CVE-2026-6769 [MEDIUM] CWE-269 GHSA-35h9-jh69-pc24: Privilege escalation in the Debugger component
Privilege escalation in the Debugger component. This vulnerability was fixed in Firefox 150 and Firefox ESR 140.10.
Red Hat
firefox: Privilege escalation in the Debugger component
vendor_redhat·2026-04-21·CVSS 8.8
CVE-2026-6769 [HIGH] CWE-266 firefox: Privilege escalation in the Debugger component
firefox: Privilege escalation in the Debugger component
A flaw was found in Firefox. The Mozilla Foundation's Security Advisory describes the following issue:
Privilege escalation in the Debugger 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) - Affected
Package: rhel10/firefox-flatpak (Red Hat Enterprise Linux 10) - Affected
Package: firefox (Red Hat Enterprise Linux 6) - Out of support scope
Package: firefox (Red Hat Enterprise Linux 7) - Affected
Package: firefox (Red Hat Enterprise Linux 8) - Affected
Package: firefox (Red Hat Enterprise Linux 9) - Affected
Mozilla
Mozilla Foundation Security Advisory 2026-32: CVE-2026-6769
vendor_mozilla·CVSS 8.8
CVE-2026-6769 [HIGH] Mozilla Foundation Security Advisory 2026-32: CVE-2026-6769
Mozilla Foundation Security Advisory 2026-32
CVE: CVE-2026-6769
Product: Firefox ESR
Impact: high
Fixed in: Firefox ESR 140.10
Mozilla
Mozilla Foundation Security Advisory 2026-34: CVE-2026-6769
vendor_mozilla·CVSS 8.8
CVE-2026-6769 [HIGH] Mozilla Foundation Security Advisory 2026-34: CVE-2026-6769
Mozilla Foundation Security Advisory 2026-34
CVE: CVE-2026-6769
Product: Thunderbird
Impact: high
Fixed in: Thunderbird 140.10
Mozilla
Mozilla Foundation Security Advisory 2026-30: CVE-2026-6769
vendor_mozilla·CVSS 8.8
CVE-2026-6769 [HIGH] Mozilla Foundation Security Advisory 2026-30: CVE-2026-6769
Mozilla Foundation Security Advisory 2026-30
CVE: CVE-2026-6769
Product: Firefox
Impact: high
Fixed in: Firefox 150
Mozilla
Mozilla Foundation Security Advisory 2026-33: CVE-2026-6769
vendor_mozilla·CVSS 8.8
CVE-2026-6769 [HIGH] Mozilla Foundation Security Advisory 2026-33: CVE-2026-6769
Mozilla Foundation Security Advisory 2026-33
CVE: CVE-2026-6769
Product: Thunderbird
Impact: high
Fixed in: Thunderbird 150
No detection rules found.
No public exploits indexed.
2026-04-21
Published