CVE-2026-16001

The Bouncy Castle Inc. bc-csharp library (versions before 2.7.0 ) is vulnerable to a message authentication key exposure in the IesEngine stream mode. Specifically, when an IesEngine is constructed without a block cipher, the MAC key is taken from the key derivation output immediately following a...

CVE-2026-16001: Improper Validation of Integrity Check Value

Exposure of the message authentication key through the encryption keystream in the stream mode of IesEngine an IesEngine constructed without a block cipher in Legion of the Bouncy Castle Inc. bc-csharp before 2.7.0 allows a remote attacker who has observed one encrypted message with known plainte...