Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1359 CNY

100%
Buy Us a Coffee

CVE-2026-8401— Sandbox escape in the Profile Backup component

Quick assessment

Affected
Mozilla Firefox
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Mozilla Firefox是美国Mozilla基金会的一款开源Web浏览器。 Mozilla Firefox 150.0.3之前版本存在安全漏洞，该漏洞源于Profile Backup组件沙箱逃逸。

AI Predicted 8.6 Difficulty: Hard EPSS 0.60% · P47

Possible ATT&CK Techniques 1 AI

T1210 · Exploitation of Remote Services

Affected Version Matrix 4

VendorProduct Version RangeStatus
Mozilla Firefox 115.36≤ 115.* unaffected
140.11≤ 140.* unaffected
150.0.3≤ * unaffected
Mozilla Thunderbird 140.11≤ * unaffected
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2026-8401

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
Sandbox escape in the Profile Backup component
Source: CVE Program / CVE List V5
Vulnerability Description
Sandbox escape in the Profile Backup component. This vulnerability was fixed in Firefox 150.0.3, Firefox ESR 115.36, Firefox ESR 140.11, and Thunderbird 140.11.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Mozilla Firefox 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Mozilla Firefox是美国Mozilla基金会的一款开源Web浏览器。 Mozilla Firefox 150.0.3之前版本存在安全漏洞，该漏洞源于Profile Backup组件沙箱逃逸。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Mozilla Firefox 115.36 ~ 115.* -
Mozilla Thunderbird 140.11 ~ * -

II. Public POCs for CVE-2026-8401

# POC Description Source Link Shenlong Link
AI-Generated POC Premium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2026-8401

请登录查看更多情报信息。

Vendor Advisories for CVE-2026-8401 (4)

Same Patch Batch · Mozilla · 2026-05-12 · 5 CVEs total

CVE-2026-8388 Incorrect boundary conditions in the JavaScript Engine: JIT component
CVE-2026-8389 JIT miscompilation in the JavaScript Engine: JIT component
CVE-2026-8390 Use-after-free in the JavaScript: WebAssembly component
CVE-2026-8391 Other issue in the JavaScript Engine component

IV. Related Vulnerabilities

Same product: Firefox
Same vendor: Mozilla

V. Comments for CVE-2026-8401

No comments yet

Leave a comment