CVE-2026-16407
CRITICALCVSS 9.8/10EPSS 0.31%
Last modified
CVE-2026-16407 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. Mitigation bypass in the DOM: Service Workers component. This vulnerability was fixed in Firefox 153 and Thunderbird 153.. EPSS estimates a 0.31% chance of exploitation in the next 30 days.
Description
Mitigation bypass in the DOM: Service Workers component. This vulnerability was fixed in Firefox 153 and Thunderbird 153.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Mozilla | Firefox | < 153.0.0 |
| Mozilla | Thunderbird | < 153.0 |
References
- https://bugzilla.mozilla.org/show_bug.cgi?id=2044063Permissions Required
- https://www.mozilla.org/security/advisories/mfsa2026-68/Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2026-71/Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Analyzed
Frequently Asked Questions
What is CVE-2026-16407?
Mitigation bypass in the DOM: Service Workers component. This vulnerability was fixed in Firefox 153 and Thunderbird 153.
How severe is CVE-2026-16407?
CVE-2026-16407 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 0.31% probability of exploitation in the next 30 days.
How do I fix CVE-2026-16407?
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
- Uncovering a hidden BOLA in Appsmith's snapshot logicStrix autonomously discovered a BOLA/IDOR vulnerability in Appsmith's snapshot deletion path.
- 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-2026-16401Privilege escalation in the Data Loss Prevention component. …8.8
- CVE-2026-16402Integer overflow in the Graphics: ImageLib component. This v…9.8
- CVE-2026-16403Spoofing issue in the Address Bar component. This vulnerabil…6.5
- CVE-2026-16404Spoofing issue in Firefox for Android. This vulnerability wa…7.4
- CVE-2026-16405Information disclosure in the Networking: WebSockets compone…7.5
- CVE-2026-16406Mitigation bypass in the Networking component. This vulnerab…9.1
- CVE-2026-16408Integer overflow in the Audio/Video: Playback component. Thi…9.8
- CVE-2026-16409Invalid pointer in the Security: PSM component. This vulnera…7.5
- CVE-2026-16410JIT miscompilation in the JavaScript Engine: JIT component. …9.8
- CVE-2026-16411Memory safety bugs present in Firefox 152. Some of these bug…9.8
- CVE-2026-16412Memory safety bugs present in Firefox ESR 140.12 and Firefox…9.8
- CVE-2026-16413Out of bounds write in ANGLE in Google Chrome prior to 150.0…8.3
Are you affected by CVE-2026-16407?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST