CVE-2026-109707
CRITICALCVSS 9.6/10
Last modified
CVE-2026-109707 is a critical-severity vulnerability rated 9.6/10 on the CVSS scale. Sandbox escape due to use-after-free in the Networking component. This vulnerability was fixed in Firefox 158, Firefox ESR 153.5, Thunderbird 158, and Thunderbird 153.5..
Description
Sandbox escape due to use-after-free in the Networking 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 |
References
Timeline
- Published
- Last Modified
- Status
- Deferred
Frequently Asked Questions
What is CVE-2026-109707?
Sandbox escape due to use-after-free in the Networking component. This vulnerability was fixed in Firefox 158, Firefox ESR 153.5, Thunderbird 158, and Thunderbird 153.5.
How severe is CVE-2026-109707?
CVE-2026-109707 has a CVSS score of 9.6/10 (CRITICAL severity).
How do I fix CVE-2026-109707?
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-2026-109701Improper Neutralization of Input During Web Page Generation …7.1
- CVE-2026-109702Improper Neutralization of Input During Web Page Generation …7.1
- CVE-2026-109703Missing Authorization vulnerability in WPGraphQL WPGraphQL w…5.3
- CVE-2026-109704Privilege escalation in the Application Update component. Th…8.8
- CVE-2026-109705Sandbox escape, site isolation issue due to incorrect bounda…9.6
- CVE-2026-109706Use-after-free in the Storage: IndexedDB component. This vul…5.4
- CVE-2026-109708Sandbox escape due to incorrect boundary conditions in the N…9.6
- CVE-2026-109709Information disclosure, privilege escalation in the Security…8.8
- CVE-2026-10971Insufficient validation of untrusted input in Printing in Go…9.6
- CVE-2026-109710Use-after-free in the Graphics: Text component. This vulnera…5.4
- CVE-2026-109711Use-after-free in the Graphics: Canvas2D component. This vul…5.4
- CVE-2026-109712Sandbox escape due to uninitialized memory in the Graphics c…7.1
Are you affected by CVE-2026-109707?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST