CVE-2026-4715
CRITICALCVSS 9.1/10EPSS 0.43%
Last modified
CVE-2026-4715 is a critical-severity vulnerability rated 9.1/10 on the CVSS scale. Uninitialized memory in the Graphics: Canvas2D component. This vulnerability was fixed in Firefox 149, Firefox ESR 140.9, Thunderbird 149, and Thunderbird 140.9.. EPSS estimates a 0.43% chance of exploitation in the next 30 days.
Description
Uninitialized memory in the Graphics: Canvas2D component. This vulnerability was fixed in Firefox 149, Firefox ESR 140.9, Thunderbird 149, and Thunderbird 140.9.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Mozilla | Firefox | < 140.9.0 |
| Mozilla | Firefox | < 149.0 |
References
- https://bugzilla.mozilla.org/show_bug.cgi?id=2018405Permissions Required
- https://www.mozilla.org/security/advisories/mfsa2026-20/Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2026-22/Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2026-4715?
Uninitialized memory in the Graphics: Canvas2D component. This vulnerability was fixed in Firefox 149, Firefox ESR 140.9, Thunderbird 149, and Thunderbird 140.9.
How severe is CVE-2026-4715?
CVE-2026-4715 has a CVSS score of 9.1/10 (CRITICAL severity). The EPSS model estimates a 0.43% probability of exploitation in the next 30 days.
How do I fix CVE-2026-4715?
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-2026-47144Shamefile is a linter for undocumented linter warnings. Prio…5.5
- CVE-2026-47145In EmberZNet v9.0.2 and earlier, malformed Color Control mes…6.5
- CVE-2026-47146In EmberZNet v9.0.2 and earlier, malformed Color Control mes…6.5
- CVE-2026-47147In EmberZNet v9.0.2 and earlier, malformed OTA requests can …7.1
- CVE-2026-47148In EmberZNet v9.0.2 and earlier, malformed GetGroupMembershi…6.5
- CVE-2026-47149In EmberZNet v9.0.2 and earlier, malformed or out-of-range D…6.5
- CVE-2026-47150In EmberZNet v9.0.2 and earlier, malformed IAS Zone enrollme…7.1
- CVE-2026-47151In EmberZNet v9.0.2 and earlier, malformed ClearWeekdaySched…7.1
- CVE-2026-47152In EmberZNet v9.0.2 and earlier, a malformed Level Control M…6.5
- CVE-2026-47153In EmberZNet v9.0.2 and earlier, a malformed Level Control S…6.5
- CVE-2026-47154In EmberZNet v9.0.2 and earlier, a malformed GetProfileRespo…6.5
- CVE-2026-47155vLLM is an inference and serving engine for large language m…6.5
Are you affected by CVE-2026-4715?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST