CVE-2026-8401

⛔ critical

🔍 Scan for this CVE

Sandbox escape in the Profile Backup component. This vulnerability was fixed in Firefox 150.0.3.

CVSS Score

9.8

Critical

EPSS Score

0.1

Exploit Probability

Published Date

2026-05-12

First Seen: 2026-05-17

This CVE is Very High Risk - more severe than 90.4% of all 321,361 vulnerabilities in our database.

#30,761

Top 10% most severe

Severity Percentile

🔍 Exploitation Status

None

No known exploits

⚙️ Automatable

YES

Can be exploited automatically

💥 Technical Impact

Total

Complete system compromise possible

🏆 Discovered By

ggwhyp

SSVC data provided by CISA

Last Modified 2026-05-15

Source NVD 🔗

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

CWE IDs (Weakness Types)

CWE-693

📦 Affected Products 1

Vendor	Product	Status	Affected Versions
mozilla	firefox	Affected	< 150.0.3

Permissions Required

Vendor Advisory

CVE ID	Severity	CVSS	Summary	Published
CVE-2026-8390	⚠️ high	7.3	Use-after-free in the JavaScript: WebAssembly component. This vulnerability was fixed in Firefox 150.0.3.	2026-05-12
CVE-2026-8090	⚠️ high	7.3	Use-after-free in the DOM: Networking component. This vulnerability was fixed in Firefox 150.0.2, Firefox ESR 140.10.2, ...	2026-05-07
CVE-2026-8091	⛔ critical	9.8	Incorrect boundary conditions in the Audio/Video: Playback component. This vulnerability was fixed in Firefox 150, Thund...	2026-05-07
CVE-2026-8092	⚠️ high	8.1	Memory safety bugs present in Firefox ESR 115.35.1, Firefox ESR 140.10.1 and Firefox 150.0.1. Some of these bugs showed ...	2026-05-07
CVE-2026-8093	⚠️ high	8.1	Memory safety bugs present in Firefox 150.0.1. Some of these bugs showed evidence of memory corruption and we presume th...	2026-05-07
CVE-2026-8094	⛔ critical	9.8	Other issue in the WebRTC component. This vulnerability was fixed in Firefox ESR 140.10.2 and Thunderbird 140.10.2.	2026-05-07

These CVEs affect the same products