CVE-2026-3847
HIGHCVSS 8.8/10EPSS 0.31%
Last modified
CVE-2026-3847 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. Memory safety bugs present in Firefox 148.0.2. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. EPSS estimates a 0.31% chance of exploitation in the next 30 days.
Description
Memory safety bugs present in Firefox 148.0.2. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability was fixed in Firefox 148.0.2.
Metrics
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Mozilla | Firefox | < 148.0.2 |
References
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2026-3847?
Memory safety bugs present in Firefox 148.0.2. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability was fixed in Firefox 148.0.2.
How severe is CVE-2026-3847?
CVE-2026-3847 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 0.31% probability of exploitation in the next 30 days.
How do I fix CVE-2026-3847?
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-2026-3846Same-origin policy bypass in the CSS Parsing and Computation…6.5
- CVE-2026-38465A Stored XSS vulnerability in the donor avatar mouse-over te…5.4
- CVE-2026-38466A Stored XSS vulnerability in the torrent remaster custom ti…5.4
- CVE-2026-38467A SQL injection vulnerability in the tags manager in Gazelle…5.4
- CVE-2026-38468A SQL injection vulnerability in the country-code lookup end…4.3
- CVE-2026-38469A Stored XSS vulnerability in the custom bonus title feature…5.4
- CVE-2026-38470A Broken access control vulnerability in the API user endpoi…4.3
- CVE-2026-38472A Stored XSS vulnerability in forum reward comments in Gazel…6.1
- CVE-2026-38473A Stored XSS vulnerability in the subtitle deletion flow in …5.4
- CVE-2026-38474GazellePW (GazellePosterWall) commit 86c4bedf727691b5a97af42…5.4
- CVE-2026-3848GitLab has remediated an issue in GitLab CE/EE affecting all…5
- CVE-2026-3849Stack Buffer Overflow in wc_HpkeLabeledExtract via Oversized…9.8
Are you affected by CVE-2026-3847?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST