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I. Basic Information for CVE-2026-34582
Vulnerability Information

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Vulnerability Title
Botan has a TLS 1.3 certificate authentication bypass
Source: NVD (National Vulnerability Database)
Vulnerability Description
Botan is a C++ cryptography library. Prior to version 3.11.1, the TLS 1.3 implementation allowed ApplicationData records to be processed prior to the Finished message being received. A server which is attempting to enforce client authentication via certificates can by bypassed by a client which entirely omits Certificate, CertificateVerify, and the Finished message and instead sends application data records. This vulnerability is fixed in 3.11.1.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
行为工作流的不恰当实施
Source: NVD (National Vulnerability Database)
Vulnerability Title
Botan 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Botan是Jack Lloyd个人开发者的一个C++加密库。 Botan 3.11.1之前版本存在安全漏洞,该漏洞源于TLS 1.3实现在接收Finished消息前处理应用数据记录,可能导致绕过客户端证书身份验证。
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
randombitbotan < 3.11.1 -
II. Public POCs for CVE-2026-34582
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III. Intelligence Information for CVE-2026-34582
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IV. Related Vulnerabilities
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