CVE-2026-109773
MEDIUMCVSS 6.5/10
Last modified
CVE-2026-109773 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. Denial-of-service in the Sync component. This vulnerability was fixed in Firefox 158 and Thunderbird 158..
Description
Denial-of-service in the Sync component. This vulnerability was fixed in Firefox 158 and Thunderbird 158.
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-2026-109773?
Denial-of-service in the Sync component. This vulnerability was fixed in Firefox 158 and Thunderbird 158.
How severe is CVE-2026-109773?
CVE-2026-109773 has a CVSS score of 6.5/10 (MEDIUM severity).
How do I fix CVE-2026-109773?
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-2026-109768Denial-of-service in the Site Reports component. This vulner…6.5
- CVE-2026-109769Information disclosure in the Networking: Cache component. T…4.3
- CVE-2026-10977Uninitialized Use in Skia in Google Chrome prior to 149.0.78…6.5
- CVE-2026-109770Spoofing issue in the DOM: Web Serial component. This vulner…
- CVE-2026-109771Information disclosure in the WebRTC: Networking component. …4.3
- CVE-2026-109772Same-origin policy bypass in the DevTools component. This vu…
- CVE-2026-109774Invalid pointer, undefined behavior in the DOM: Notification…
- CVE-2026-109775Denial-of-service in the WebRTC component. This vulnerabilit…6.5
- CVE-2026-109776Race condition in the XPCOM component. This vulnerability wa…4.2
- CVE-2026-109777Information disclosure in the Storage: IndexedDB component. …4.3
- CVE-2026-109778Privilege escalation in the WebExtensions component. This vu…8.8
- CVE-2026-109779Race condition in the Networking: DNS component. This vulner…4.2
Are you affected by CVE-2026-109773?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST