CVE-2020-26958
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I. Basic Information for CVE-2020-26958
Vulnerability Information
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Vulnerability Title
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Description
Firefox did not block execution of scripts with incorrect MIME types when the response was intercepted and cached through a ServiceWorker. This could lead to a cross-site script inclusion vulnerability, or a Content Security Policy bypass. This vulnerability affects Firefox < 83, Firefox ESR < 78.5, and Thunderbird < 78.5.
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 跨站脚本漏洞
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。 FireFox 存在跨站脚本漏洞，该漏洞源于当响应被拦截并通过ServiceWorker缓存时，Firefox没有阻止使用不正确MIME类型的脚本的执行。这可能导致跨站点脚本包含漏洞，或者绕过内容安全策略。
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 | < 83 | - | |
| Mozilla | Firefox ESR | < 78.5 | - | |
| Mozilla | Thunderbird | < 78.5 | - |
II. Public POCs for CVE-2020-26958
| # | POC Description | Source Link | Shenlong Link |
|---|
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- https://www.mozilla.org/security/advisories/mfsa2020-50/x_refsource_CONFIRM
- https://bugzilla.mozilla.org/show_bug.cgi?id=1669355x_refsource_MISC
- https://www.mozilla.org/security/advisories/mfsa2020-52/x_refsource_CONFIRM
- https://www.mozilla.org/security/advisories/mfsa2020-51/x_refsource_CONFIRM
- https://nvd.nist.gov/vuln/detail/CVE-2020-26958
Same Patch Batch · Mozilla · 2020-12-09 · 21 CVEs total
| CVE-2020-26961 | Mozilla Firefox 安全漏洞 | |
| CVE-2020-26970 | Mozilla Thunderbird 缓冲区错误漏洞 | |
| CVE-2020-26969 | Mozilla Firefox ESR 缓冲区错误漏洞 | |
| CVE-2020-26968 | Mozilla Firefox ESR 缓冲区错误漏洞 | |
| CVE-2020-26967 | Mozilla Firefox 安全漏洞 | |
| CVE-2020-26966 | Mozilla Firefox 安全漏洞 | |
| CVE-2020-26965 | Mozilla Firefox 安全漏洞 | |
| CVE-2020-26964 | Mozilla Firefox for Android 安全漏洞 | |
| CVE-2020-26963 | Mozilla Firefox 安全漏洞 | |
| CVE-2020-26962 | Mozilla Firefox 安全漏洞 | |
| CVE-2020-26950 | Mozilla Firefox 资源管理错误漏洞 | |
| CVE-2020-26960 | Mozilla Firefox 资源管理错误漏洞 | |
| CVE-2020-26959 | Mozilla Firefox 资源管理错误漏洞 | |
| CVE-2020-26957 | Mozilla Firefox for Android 安全漏洞 | |
| CVE-2020-26956 | 多款Mozilla产品跨站脚本漏洞 | |
| CVE-2020-26955 | Mozilla Firefox 安全漏洞 | |
| CVE-2020-26954 | Mozilla Firefox 安全漏洞 | |
| CVE-2020-26953 | Mozilla Firefox 和 Mozilla Thunderbird 安全漏洞 | |
| CVE-2020-26952 | Mozilla Firefox 缓冲区错误漏洞 | |
| CVE-2020-26951 | Mozilla Firefox 跨站脚本漏洞 |
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
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