Randombit Botan vulnerabilities

CVE-2026-34580 [CRITICAL] CWE-295 CVE-2026-34580: Botan is a C++ cryptography library. In 3.11.0, the function Certificate_Store::certificate_known ha Botan is a C++ cryptography library. In 3.11.0, the function Certificate_Store::certificate_known had a misleading name; it would return true if any certificate in the store had a DN (and subject key identifier, if set) matching that of the argument. It did not check that the cert it found and the cert it was passed were actually the same certific

CVE-2026-34582 [HIGH] CWE-841 CVE-2026-34582: Botan is a C++ cryptography library. Prior to version 3.11.1, the TLS 1.3 implementation allowed App 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 Fi

CVE-2026-32877 [HIGH] CWE-125 CVE-2026-32877: Botan is a C++ cryptography library. From version 2.3.0 to before version 3.11.0, during SM2 decrypt Botan is a C++ cryptography library. From version 2.3.0 to before version 3.11.0, during SM2 decryption, the code that checked the authentication code value (C3) failed to check that the encoded value was of the expected length prior to comparison. An invalid ciphertext can cause a heap over-read of up to 31 bytes, resulting in a crash or potentially

CVE-2026-32884 [MEDIUM] CWE-295 CVE-2026-32884: Botan is a C++ cryptography library. Prior to version 3.11.0, during processing of an X.509 certific Botan is a C++ cryptography library. Prior to version 3.11.0, during processing of an X.509 certificate path using name constraints which restrict the set of allowable DNS names, if no subject alternative name is defined in the end-entity certificate Botan would check that the CN was allowed by the DNS name constraints, even though this check is tec

CVE-2026-32883 [MEDIUM] CWE-347 CVE-2026-32883: Botan is a C++ cryptography library. From version 3.0.0 to before version 3.11.0, during X509 path v 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.

CVE-2024-34702 [MEDIUM] CWE-405 CVE-2024-34702: Botan is a C++ cryptography library. X.509 certificates can identify elliptic curves using either an Botan is a C++ cryptography library. X.509 certificates can identify elliptic curves using either an object identifier or using explicit encoding of the parameters. Prior to 3.5.0 and 2.19.5, checking name constraints in X.509 certificates is quadratic in the number of names and name constraints. An attacker who presented a certificate chain which c

CVE-2024-39312 [MEDIUM] CWE-295 CVE-2024-39312: Botan is a C++ cryptography library. X.509 certificates can identify elliptic curves using either an Botan is a C++ cryptography library. X.509 certificates can identify elliptic curves using either an object identifier or using explicit encoding of the parameters. A bug in the parsing of name constraint extensions in X.509 certificates meant that if the extension included both permitted subtrees and excluded subtrees, only the permitted subtree wo

CVE-2024-34703 [HIGH] CWE-405 CVE-2024-34703: Botan is a C++ cryptography library. X.509 certificates can identify elliptic curves using either an Botan is a C++ cryptography library. X.509 certificates can identify elliptic curves using either an object identifier or using explicit encoding of the parameters. Prior to versions 3.3.0 and 2.19.4, an attacker could present an ECDSA X.509 certificate using explicit encoding where the parameters are very large. The proof of concept used a 16Kbit pri

CVE-2017-2801 [CRITICAL] CWE-125 CVE-2017-2801: A programming error exists in a way Randombit Botan cryptographic library version 2.0.1 implements x A programming error exists in a way Randombit Botan cryptographic library version 2.0.1 implements x500 string comparisons which could lead to certificate verification issues and abuse. A specially crafted X509 certificate would need to be delivered to the client or server application in order to trigger this vulnerability.