CVE-2026-74969
HIGHCVSS 8.8/10EPSS 0.48%
Last modified
CVE-2026-74969 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. Race condition, use-after-free in the Layout: Text and Fonts component. This vulnerability was fixed in Firefox 154, Firefox ESR 115.39, Firefox ESR 140.14, Firefox ESR 153.1, Thunderbird 154, Thunderbird 140.14, and Thunderbird 153.1.. EPSS estimates a 0.48% chance of exploitation in the next 30 days.
Description
Race condition, use-after-free in the Layout: Text and Fonts component. This vulnerability was fixed in Firefox 154, Firefox ESR 115.39, Firefox ESR 140.14, Firefox ESR 153.1, Thunderbird 154, Thunderbird 140.14, and Thunderbird 153.1.
Metrics
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Mozilla | Firefox | < 115.39.0 |
| Mozilla | Firefox | >= 116.0, < 140.14.0 |
| Mozilla | Firefox | >= 141.0, < 153.1.0 |
| Mozilla | Thunderbird | < 140.14.0 |
| Mozilla | Thunderbird | >= 141.0, < 153.1.0 |
References
- https://bugzilla.mozilla.org/show_bug.cgi?id=2056065Permissions Required
- https://www.mozilla.org/security/advisories/mfsa2026-74/Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2026-75/Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2026-76/Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2026-77/Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2026-78/Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2026-79/Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2026-80/Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2026-74969?
Race condition, use-after-free in the Layout: Text and Fonts component. This vulnerability was fixed in Firefox 154, Firefox ESR 115.39, Firefox ESR 140.14, Firefox ESR 153.1, Thunderbird 154, Thunderbird 140.14, and Thunderbird 153.1.
How severe is CVE-2026-74969?
CVE-2026-74969 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 0.48% probability of exploitation in the next 30 days.
How do I fix CVE-2026-74969?
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-2026-74963Same-origin policy bypass in the Networking: Cookies compone…5.4
- CVE-2026-74964Integer overflow in the Graphics component. This vulnerabili…9.8
- CVE-2026-74965Privilege escalation in the Shell Integration component. Thi…8.8
- CVE-2026-74966Information disclosure in the Form Autofill component. This …7.5
- CVE-2026-74967Same-origin policy bypass in the Audio/Video: Playback compo…5.4
- CVE-2026-74968Site isolation issue in the Graphics: WebRender component. T…5.4
- CVE-2026-74970Site isolation issue in the Graphics component. This vulnera…5.4
- 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
Are you affected by CVE-2026-74969?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST