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I. Basic Information for CVE-2026-0877
Vulnerability Information
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Vulnerability Title
Mitigation bypass in the DOM: Security component
Source: NVD (National Vulnerability Database)
Vulnerability Description
Mitigation bypass in the DOM: Security component. This vulnerability was fixed in Firefox 147, Firefox ESR 115.32, Firefox ESR 140.7, Thunderbird 147, and Thunderbird 140.7.
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 147之前版本、Firefox ESR 115.32之前版本和Firefox ESR 140.7之前版本存在安全漏洞，该漏洞源于DOM Security组件存在缓解绕过。
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
VendorProductAffected VersionsCPESubscribe
MozillaFirefox 115.32 ~ 115.* -
MozillaThunderbird 140.7 ~ 140.* -
II. Public POCs for CVE-2026-0877
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III. Intelligence Information for CVE-2026-0877
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IV. Related Vulnerabilities
Same product: Firefox
Same vendor: Mozilla
V. Comments for CVE-2026-0877

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