Vulnerability details

CVE-2026-2791

Mitigation bypass in the Networking: Cache component

CVSS 3.1

9.8Critical

Official description

Mitigation bypass in the Networking: Cache component. This vulnerability was fixed in Firefox 148, Firefox ESR 140.8, Thunderbird 148, and Thunderbird 140.8.

CVSS scores

Score	Version	Source	Vector
9.8Critical	3.1	CISA ADP / Vulnrichment (CISA-ADP)	`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`

Affected products

Vendor	Product	Versions	Source
No product information recorded.

References and advisories

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Details

Published: 2026-02-24
Last updated: 2026-04-21
State: Published
Assigner (CNA): mozilla

Exploit prediction (EPSS)

0.59%

Probability of exploitation in 30 days

48.8%

Percentile (among all CVEs)

SSVC assessment (CISA)

Automatable: Yes
Exploitation: None
Technical impact: Total

Weaknesses (CWE)

CWE-288
Authentication Bypass Using an Alternate Path or Channel