CVE-2026-6760 | Mitigation bypass in the Networking: Cookies component. This… | CVSS 9.8 CRITICAL

Description

Mitigation bypass in the Networking: Cookies component. This vulnerability was fixed in Firefox 150 and Thunderbird 150.

CVE ID: CVE-2026-6760
State: PUBLISHED
Assigner: mozilla
Reserved: 2026-04-21 12:40 UTC
Published: 2026-04-21 12:40 UTC
Last updated: 2026-05-26 17:49 UTC
Primary CWE: CWE-288
CWE-288 Authentication Bypass Using an Alternate Path or Cha…
Vendor / Product: Mozilla / Firefox
Sources: cve.org · NVD

9.8 CRITICAL CVSS 3.1

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

SSVC — CISA Coordinator

Affected products (2)

Vendor	Product	Platform	Versions
Mozilla	Firefox	—	150 ≤ *
Mozilla	Thunderbird	—	150 ≤ *

Weakness (CWE)

CWE	Source	Description
CWE-288	adp	CWE-288 Authentication Bypass Using an Alternate Path or Channel

CVSS scores (1)

Score	Severity	Version	Source	Vector
9.8	CRITICAL	3.1	adp	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References (3)