CVE-2026-121842
Privilege escalation in the Reader View component in Firefox for iOS
Privilege escalation in the Reader View component in Firefox for iOS. This vulnerability was fixed in Firefox for iOS 160.0.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- Required
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
What each source reports
CVE List Score used
Privilege escalation in the Reader View component in Firefox for iOS
Privilege escalation in the Reader View component in Firefox for iOS. This vulnerability was fixed in Firefox for iOS 160.0.
- Record
CVE-2026-121842- CVSS 3.1
- 8.8 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H - Updated
- 2026-11-09
EUVDEUVD-2026-120058
Privilege escalation in the Reader View component in Firefox for iOS. This vulnerability was fixed in Firefox for iOS 160.0.
- Record
EUVD-2026-120058- CVSS 3.1
- 8.8 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H - Updated
- 2026-11-09
GitHub AdvisoriesGHSA-347w-cc86-vh56
Privilege escalation in the Reader View component in Firefox for iOS. This vulnerability was...
Privilege escalation in the Reader View component in Firefox for iOS. This vulnerability was fixed in Firefox for iOS 160.0.
- Record
GHSA-347w-cc86-vh56- CVSS 3.1
- 8.8 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H - Updated
- 2026-11-09
NVD
Privilege escalation in the Reader View component in Firefox for iOS. This vulnerability was fixed in Firefox for iOS 160.0.
- Record
CVE-2026-121842- CVSS 3.1
- 8.8 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H - Updated
- 2026-11-09
Affected products
History
| Recorded | Changed | Sources |
|---|---|---|
| published | EUVD, NVD | |
| published | EUVD, NVD | |
| aliases, references | GitHub Advisories | |
| severity | CVE List | |
| aliases, published, severity | EUVD | |
| first indexed | CVE List |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2026-121842 is a high vulnerability (CVSS 8.8) in Mozilla Firefox For Ios, published November 9, 2026. No source lists public exploit code. No source names a fixed version.