CVE-2026-84127
MEDIUMCVSS 4.3/10EPSS 0.17%
Last modified
CVE-2026-84127 is a medium-severity vulnerability rated 4.3/10 on the CVSS scale. Information disclosure in the WebExtensions component in Firefox for Android. This vulnerability was fixed in Firefox 155.. EPSS estimates a 0.17% chance of exploitation in the next 30 days.
Description
Information disclosure in the WebExtensions component in Firefox for Android. This vulnerability was fixed in Firefox 155.
Metrics
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Mozilla | Firefox Mobile | < 155.0 |
References
- https://bugzilla.mozilla.org/show_bug.cgi?id=1699444Issue Tracking, Exploit
- https://www.mozilla.org/security/advisories/mfsa2026-82/Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Analyzed
Frequently Asked Questions
What is CVE-2026-84127?
Information disclosure in the WebExtensions component in Firefox for Android. This vulnerability was fixed in Firefox 155.
How severe is CVE-2026-84127?
CVE-2026-84127 has a CVSS score of 4.3/10 (MEDIUM severity). The EPSS model estimates a 0.17% probability of exploitation in the next 30 days.
How do I fix CVE-2026-84127?
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-2026-84121Sandbox escape due to use-after-free in the DOM: Security co…9.6
- CVE-2026-84122Use-after-free in the Audio/Video component. This vulnerabil…5.4
- CVE-2026-84123Privilege escalation due to use-after-free in the Graphics: …8.8
- CVE-2026-84124Use-after-free in the DOM: Core & HTML component. This vulne…5.4
- CVE-2026-84125Use-after-free in the DOM: Core & HTML component. This vulne…5.4
- CVE-2026-84126Incorrect boundary conditions in the Layout: Grid component.…4.3
- CVE-2026-84128Privilege escalation in the WebDriver BiDi component. This v…8.8
- CVE-2026-84129Site isolation issue in the DOM: Navigation component. This …9.8
- CVE-2026-8413Concrete CMS 9 before 9.5.0 is vulnerable to Cross Site Requ…8.8
- CVE-2026-84130Information disclosure in the Graphics: WebGPU component. Th…7.5
- CVE-2026-84131Privilege escalation due to invalid pointer in the Graphics …8.8
- CVE-2026-84132Information disclosure in the Networking: HTTP component. Th…7.5
Are you affected by CVE-2026-84127?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST