CVE-2026-74977
HIGHCVSS 7.5/10
Last modified
CVE-2026-74977 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. Integer overflow in the Graphics component. This vulnerability was fixed in Firefox 154, Firefox ESR 153.1, Thunderbird 154, and Thunderbird 153.1..
Description
Integer overflow in the Graphics component. This vulnerability was fixed in Firefox 154, Firefox ESR 153.1, Thunderbird 154, and Thunderbird 153.1.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
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
- Undergoing Analysis
Frequently Asked Questions
What is CVE-2026-74977?
Integer overflow in the Graphics component. This vulnerability was fixed in Firefox 154, Firefox ESR 153.1, Thunderbird 154, and Thunderbird 153.1.
How severe is CVE-2026-74977?
CVE-2026-74977 has a CVSS score of 7.5/10 (HIGH severity).
How do I fix CVE-2026-74977?
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-2026-74971Information disclosure in the DOM: UI Events & Focus Handlin…4.3
- CVE-2026-74972Information disclosure in the DOM: Push Subscriptions compon…4.3
- CVE-2026-74973Race condition, use-after-free in the Graphics component. Th…4.2
- CVE-2026-74974Same-origin policy bypass in the Graphics: ImageLib componen…5.4
- CVE-2026-74975Spoofing issue in the Downloads component in Firefox for And…5.4
- CVE-2026-74976JIT miscompilation in the JavaScript Engine: JIT component. …6.5
- CVE-2026-74978Clickjacking issue in the Widget component. This vulnerabili…8.1
- CVE-2026-74979Mitigation bypass in the Add-ons Manager component. This vul…9.8
- CVE-2026-7498Improper neutralization of input during web page generation …8.8
- CVE-2026-74980Clickjacking issue in the Downloads component in Firefox for…6.5
- CVE-2026-74981Site isolation issue in the Audio/Video: Web Codecs componen…8.1
- CVE-2026-74982Denial-of-service in the Widget component. This vulnerabilit…7.5
Are you affected by CVE-2026-74977?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST