PT-2026-104125

Inefficient algorithmic complexity in X.509 distinguished name string conversion X509Name.ToString and IetfUtilities.ValueToString in Legion of the Bouncy Castle Inc. bc-csharp before 2.7.0 allows a remote unauthenticated attacker to cause a denial of service through CPU exhaustion via a...

PT-2026-104107

Improper input validation in DHAgreement.CalculateAgreement MTI/A0 two-pass Diffie-Hellman in Legion of the Bouncy Castle Inc. bc-csharp before 2.7.0 allows an on-path attacker to make the local party compute an agreed value the attacker already knows, defeating the key authentication MTI/A0 is...

PT-2026-104130

Improper verification of cryptographic signature in the attribute certificate path validator PkixAttrCertPathValidator, also used by PkixAttrCertPathBuilder in Legion of the Bouncy Castle Inc. bc-csharp before 2.7.0 allows a remote attacker to have a forged X.509 attribute certificate accepted as...

PT-2026-104101

Missing cryptographic step in the DSTU 7624 CCM mode implementation KCcmBlockCipher in Legion of the Bouncy Castle Inc. bc-csharp before 2.7.0 allows an attacker who can observe encrypted messages of known or chosen content to forge ciphertexts with valid authentication tags, via messages encrypt...

PT-2026-104106

Allocation of resources without limits or throttling in the CMP/CRMF password-based MAC verifier PKMacBuilder in Legion of the Bouncy Castle Inc. bc-csharp before 2.7.0 allows a remote unauthenticated attacker to cause a denial of service through CPU exhaustion via a CMP message or CRMF certifica...

PT-2026-104124

Memory allocation with excessive size value in the HSS/LMS signature code HssPublicKeyParameters, HssSignature in Legion of the Bouncy Castle Inc. bc-csharp before 2.7.0 allows a remote unauthenticated attacker who can supply both an HSS public key and a signature to cause a denial of service...

PT-2026-104134

Name of the Vulnerable Software and Affected Versions bc-csharp versions prior to 2.7.0 Description A loop with an unreachable exit condition exists in the PKCS12 key derivation Pkcs12ParametersGenerator. An attacker can cause a denial of service through CPU exhaustion by providing a PKCS12 PFX...

CVE-2026-103603: Memory Allocation with Excessive Size Value

Memory allocation with excessive size value in the HSS/LMS signature code HssPublicKeyParameters, HssSignature in Legion of the Bouncy Castle Inc. bc-csharp before 2.7.0 allows a remote unauthenticated attacker who can supply both an HSS public key and a signature to cause a denial of service...