SecuriTricks - CVE-2026-6750

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.

Product(s) Impacted

Vendor	Product	Versions
Mozilla	Firefox Thunderbird	* *

Weaknesses

Common security weaknesses mapped to this vulnerability.

CWE-269

Improper Privilege Management

The product does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor.

*CPE(s)

Affected systems and software identified for this CVE.

Type	Vendor	Product	Version	Update	Edition	Language	Software Edition	Target Software	Target Hardware	Other Information
a	mozilla	firefox	/	/	/	/	esr	/	/	/
a	mozilla	firefox	/	/	/	/	-	/	/	/
a	mozilla	firefox	/	/	/	/	esr	/	/	/
a	mozilla	thunderbird	/	/	/	/	esr	/	/	/

References

https://bugzilla.mozilla.org/show_bug.cgi?id=2023407

https://www.mozilla.org/security/advisories/mfsa2026-30/

https://www.mozilla.org/security/advisories/mfsa2026-31/

https://www.mozilla.org/security/advisories/mfsa2026-32/

https://www.mozilla.org/security/advisories/mfsa2026-33/

https://www.mozilla.org/security/advisories/mfsa2026-34/

CVSS Score

9.8 / 10

CVSS Data - 3.1

Attack Vector: NETWORK
Attack Complexity: LOW
Privileges Required: NONE
Scope: UNCHANGED
Confidentiality Impact: HIGH
Integrity Impact: HIGH
Availability Impact: HIGH

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

View Vector String

Timeline

Published: April 21, 2026, 1:16 p.m.
Last Modified: April 22, 2026, 4:16 p.m.

Status : Modified

CVE has been recently published to the CVE List and has been received by the NVD.

More info

Source

[email protected]

CVE-2026-6750