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I. Basic Information for CVE-2026-25793
Vulnerability Information

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Vulnerability Title
Nebula Has Possible Blocklist Bypass via ECDSA Signature Malleability
Source: NVD (National Vulnerability Database)
Vulnerability Description
Nebula is a scalable overlay networking tool. In versions from 1.7.0 to 1.10.2, when using P256 certificates (which is not the default configuration), it is possible to evade a blocklist entry created against the fingerprint of a certificate by using ECDSA Signature Malleability to use a copy of the certificate with a different fingerprint. This issue has been patched in version 1.10.3.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
密码学签名的验证不恰当
Source: NVD (National Vulnerability Database)
Vulnerability Title
Nebula 数据伪造问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Nebula是Web UI Designing开源的一个专注于增强开发的 WordPress 主题框架。 Nebula 1.7.0至1.10.2版本存在数据伪造问题漏洞,该漏洞源于使用P256证书时可能通过ECDSA签名延展性规避证书指纹的阻止列表条目。
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
slackhqnebula >= 1.7.0, < 1.10.3 -
II. Public POCs for CVE-2026-25793
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III. Intelligence Information for CVE-2026-25793
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IV. Related Vulnerabilities
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