CVE-2026-7321— Sandbox escape due to incorrect boundary conditions in the WebRTC: Networking component
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I. Basic Information for CVE-2026-7321
Vulnerability Information
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Vulnerability Title
Sandbox escape due to incorrect boundary conditions in the WebRTC: Networking component
Source: NVD (National Vulnerability Database)
Vulnerability Description
Sandbox escape due to incorrect boundary conditions in the WebRTC: Networking component. This vulnerability was fixed in Firefox 150, Thunderbird 150, Firefox ESR 140.10.1, and Thunderbird 140.10.1.
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 ESR 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Mozilla Firefox ESR是美国Mozilla基金会的Firefox(Web浏览器)的一个延长支持版本。 Mozilla Firefox ESR 140.10.1之前版本存在安全漏洞，该漏洞源于WebRTC: Networking组件边界条件不正确，可能导致沙箱逃逸。
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 | 140.10.1 ~ 140.* | - | |
| Mozilla | Thunderbird | 140.10.1 ~ 140.* | - |
II. Public POCs for CVE-2026-7321
| # | POC Description | Source Link | Shenlong Link |
|---|
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Same Patch Batch · Mozilla · 2026-04-28 · 5 CVEs total
| CVE-2026-7320 | Information disclosure due to incorrect boundary conditions in the Audio/Video component | |
| CVE-2026-7322 | Memory safety bugs fixed in Thunderbird ESR 140.10.1 and Thunderbird 150.0.1 | |
| CVE-2026-7323 | Memory safety bugs fixed in Thunderbird ESR 140.10.1 and Thunderbird 150.0.1 | |
| CVE-2026-7324 | Memory safety bugs fixed in Thunderbird 150.0.1 |
IV. Related Vulnerabilities
Same product: Firefox
- CVE-2026-8093
Memory safety bugs fixed in Thunderbird 150.0.2 - CVE-2026-8094
Other issue in the WebRTC component - CVE-2026-8092
Memory safety bugs fixed in Thunderbird ESR 140.10.2 and Thu - CVE-2026-8091
Incorrect boundary conditions in the Audio/Video: Playback c - CVE-2026-8090
Use-after-free in the DOM: Networking component
Same vendor: Mozilla
- CVE-2026-8093
Memory safety bugs fixed in Thunderbird 150.0.2 - CVE-2026-8094
Other issue in the WebRTC component - CVE-2026-8092
Memory safety bugs fixed in Thunderbird ESR 140.10.2 and Thu - CVE-2026-8091
Incorrect boundary conditions in the Audio/Video: Playback c - CVE-2026-8090
Use-after-free in the DOM: Networking component
V. Comments for CVE-2026-7321
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