CVE-2026-109754
HIGHCVSS 8.1/10EPSS 0.16%
Last modified
CVE-2026-109754 is a high-severity vulnerability rated 8.1/10 on the CVSS scale. Incorrect boundary conditions in the DOM: Editor component. This vulnerability was fixed in Firefox 158, Firefox ESR 153.5, Thunderbird 158, and Thunderbird 153.5.. EPSS estimates a 0.16% chance of exploitation in the next 30 days.
Description
Incorrect boundary conditions in the DOM: Editor component. This vulnerability was fixed in Firefox 158, Firefox ESR 153.5, Thunderbird 158, and Thunderbird 153.5.
Metrics
Weakness Enumeration
Affected Software
Source: CNA advisory (CVE.org). NVD analysis pending.
| Vendor | Product | Versions |
|---|---|---|
| Mozilla | Firefox | All versions |
| Mozilla | Thunderbird | All versions |
References
Timeline
- Published
- Last Modified
- Status
- Deferred
Frequently Asked Questions
What is CVE-2026-109754?
Incorrect boundary conditions in the DOM: Editor component. This vulnerability was fixed in Firefox 158, Firefox ESR 153.5, Thunderbird 158, and Thunderbird 153.5.
How severe is CVE-2026-109754?
CVE-2026-109754 has a CVSS score of 8.1/10 (HIGH severity). The EPSS model estimates a 0.16% probability of exploitation in the next 30 days.
How do I fix CVE-2026-109754?
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-2026-109749Use-after-free in the JavaScript: WebAssembly component. Thi…5.4
- CVE-2026-10975Use after free in WebRTC in Google Chrome prior to 149.0.782…8.8
- CVE-2026-109750Site isolation issue in the DOM: Web Authentication componen…
- CVE-2026-109751Information disclosure in the Networking component. This vul…4.3
- CVE-2026-109752Use-after-free in the DOM: Workers component. This vulnerabi…5.4
- CVE-2026-109753Incorrect boundary conditions in the Layout component. This …8.1
- CVE-2026-109755Sandbox escape in the DOM: Content Processes component. This…9.6
- CVE-2026-109756Privilege escalation in the DOM: Navigation component. This …8.8
- CVE-2026-109757Sandbox escape due to race condition in the Networking compo…8.3
- CVE-2026-109758Perforce Helix Authentication Service (HAS) deployments that…9.3
- CVE-2026-109759Site isolation issue in the Networking component. This vulne…8.1
- CVE-2026-10976Uninitialized Use in Dawn in Google Chrome prior to 149.0.78…7.4
Are you affected by CVE-2026-109754?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST