CVE-2026-8401— Sandbox escape in the Profile Backup component
Possible ATT&CK Techniques 1AI
T1210 · Exploitation of Remote ServicesAffected Version Matrix 4
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Mozilla | Firefox | 115.36≤ 115.* | unaffected |
140.11≤ 140.* | unaffected | ||
150.0.3≤ * | unaffected | ||
| Mozilla | Thunderbird | 140.11≤ * | unaffected |
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I. Basic Information for CVE-2026-8401
Vulnerability Information
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Vulnerability Title
Sandbox escape in the Profile Backup component
Source: NVD (National Vulnerability Database)
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: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
N/A
Source: NVD (National Vulnerability Database)
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 |
|---|
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No public POC found.
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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
- CVE-2026-10702
JIT miscompilation in the JavaScript Engine: JIT component - CVE-2026-10701
Incorrect boundary conditions in the Graphics: Text componen - CVE-2026-8975
Memory safety bugs fixed in Firefox ESR 115.36, Firefox ESR - CVE-2026-8974
Memory safety bugs fixed in Firefox ESR 140.11 and Firefox 1 - CVE-2026-8973
Memory safety bugs fixed in Firefox 151
Same vendor: Mozilla
- CVE-2026-11799
UXSS in Focus for iOS / Klar Webkit navigation - CVE-2026-10702
JIT miscompilation in the JavaScript Engine: JIT component - CVE-2026-10701
Incorrect boundary conditions in the Graphics: Text componen - CVE-2026-9308
Arbitrary JavaScript execution in Reader View due to wrong H - CVE-2026-9309
Arbitrary JavaScript execution in internal pages via Reader
V. Comments for CVE-2026-8401
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