CVSS Vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
Lifecycle Timeline
3Description
Botan is a C++ cryptography library. From version 3.0.0 to before version 3.11.0, during X509 path validation, OCSP responses were checked for an appropriate status code, but critically omitted verifying the signature of the OCSP response itself. This issue has been patched in version 3.11.0.
Analysis
Botan cryptography library versions 3.0.0 through 3.10.x fail to verify OCSP response signatures during X.509 certificate path validation, allowing attackers to forge certificate status responses and potentially bypass revocation checks. This integrity bypass affects any application using Botan for TLS or certificate validation and requires network positioning but not authentication. …
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External POC / Exploit Code
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EUVD-2026-17211