CVE-2026-121842
HIGHCVSS 8.8/10EPSS 0.29%
Last modified
CVE-2026-121842 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. Privilege escalation in the Reader View component in Firefox for iOS. This vulnerability was fixed in Firefox for iOS 160.0.. EPSS estimates a 0.29% chance of exploitation in the next 30 days.
Description
Privilege escalation in the Reader View component in Firefox for iOS. This vulnerability was fixed in Firefox for iOS 160.0.
Metrics
Affected Software
Source: CNA advisory (CVE.org). NVD analysis pending.
| Vendor | Product | Versions |
|---|---|---|
| Mozilla | Firefox for iOS | All versions |
References
Timeline
- Published
- Last Modified
- Status
- Deferred
Frequently Asked Questions
What is CVE-2026-121842?
Privilege escalation in the Reader View component in Firefox for iOS. This vulnerability was fixed in Firefox for iOS 160.0.
How severe is CVE-2026-121842?
CVE-2026-121842 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 0.29% probability of exploitation in the next 30 days.
How do I fix CVE-2026-121842?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
Related CVEs from 2026
- CVE-2026-121823A vulnerability has been identified in armeria versions prio…8.7
- CVE-2026-121824A vulnerability has been identified in armeria versions prio…8.7
- CVE-2026-121825OpenAM (OpenAM Consortium Edition) 14.0.5 and earlier contai…6.1
- CVE-2026-12183Nefteprodukttekhnika BUK TS-G Gas Station Automation System …9.8
- CVE-2026-121837A flaw was found in the REST Data Panache component of Quark…4.3
- CVE-2026-121841Other issue in Firefox for iOS. This vulnerability was fixed…7.3
- CVE-2026-121843Privilege escalation in Firefox for iOS. This vulnerability …8.8
- CVE-2026-121848The Magic Link WordPress plugin before 2.2.6 does not check…8.8
- CVE-2026-12185In Bouncy Castle for Java before 1.85, BKS/UBER keystore all…8.6
- CVE-2026-121853The AppPresser WordPress plugin before 5.0.0 does not restr…5.3
- CVE-2026-121857The Event Tickets with Ticket Scanner WordPress plugin befor…4.2
- CVE-2026-121858The Event Tickets with Ticket Scanner WordPress plugin befor…6.3
Are you affected by CVE-2026-121842?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST