CVE-2026-6772
HIGHCVSS 7.5/10EPSS 0.27%
Last modified
CVE-2026-6772 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. Incorrect boundary conditions in the Libraries component in NSS. This vulnerability was fixed in Firefox 150, Firefox ESR 115.35, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10.. EPSS estimates a 0.27% chance of exploitation in the next 30 days.
Description
Incorrect boundary conditions in the Libraries component in NSS. This vulnerability was fixed in Firefox 150, Firefox ESR 115.35, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Mozilla | Firefox | < 115.35.0 |
| Mozilla | Firefox | < 150.0 |
| Mozilla | Firefox | >= 140.0, < 140.10.0 |
| Mozilla | Thunderbird | < 140.10.0 |
References
- https://bugzilla.mozilla.org/show_bug.cgi?id=2026089Permissions Required
- https://www.mozilla.org/security/advisories/mfsa2026-30/Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2026-31/Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2026-32/Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2026-33/Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2026-34/Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Analyzed
Frequently Asked Questions
What is CVE-2026-6772?
Incorrect boundary conditions in the Libraries component in NSS. This vulnerability was fixed in Firefox 150, Firefox ESR 115.35, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10.
How severe is CVE-2026-6772?
CVE-2026-6772 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 0.27% probability of exploitation in the next 30 days.
How do I fix CVE-2026-6772?
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-2026-67687Insecure Permissions vulnerability in ics-park v.2.0 allows …8.8
- CVE-2026-67688ICS-Park Smart Park Management System v2.0 contains an unres…9.8
- CVE-2026-67689SQL Injection vulnerability in FineAdmin V1.0 allows a remot…9.8
- CVE-2026-6769Privilege escalation in the Debugger component. This vulnera…8.8
- CVE-2026-6770Other issue in the Storage: IndexedDB component. This vulner…6.5
- CVE-2026-6771Mitigation bypass in the DOM: Security component. This vulne…9.8
- CVE-2026-6773Denial-of-service due to integer overflow in the Graphics: W…7.5
- CVE-2026-6774Mitigation bypass in the DOM: Security component. This vulne…5.4
- CVE-2026-6775Incorrect boundary conditions in the WebRTC component. This …5.3
- CVE-2026-6776Incorrect boundary conditions in the WebRTC: Networking comp…7.8
- CVE-2026-6777Other issue in the Networking: DNS component. This vulnerabi…5.3
- CVE-2026-6778Invalid pointer in the Audio/Video: Playback component. This…5.3
Are you affected by CVE-2026-6772?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST