CVE-2026-6750

Name: CVE-2026-6750
Creator: NVD / NIST
Published: 2026-04-21T13:16:21.073+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.8/10EPSS 0.39%

Last modified Jun 17, 2026

CVE-2026-6750 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. Privilege escalation in the Graphics: WebRender component. This vulnerability was fixed in Firefox 150, Firefox ESR 115.35, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10.. EPSS estimates a 0.39% chance of exploitation in the next 30 days.

Description

Privilege escalation in the Graphics: WebRender component. 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

8.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

EPSS Probability

0.39%

30.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-269

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=2023407Permissions 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: Apr 21, 2026
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2026-6750?

Privilege escalation in the Graphics: WebRender component. 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-2026-6750?

CVE-2026-6750 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 0.39% probability of exploitation in the next 30 days.

How do I fix CVE-2026-6750?

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.

Are you affected by CVE-2026-6750?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST