Legion Of The Bouncy Castle Inc. Bc Csharp vulnerabilities, page 2

21 vulnerabilities

Known vulnerabilities in Legion Of The Bouncy Castle Inc. Bc Csharp, newest first, with CVSS severity, EPSS, KEV listings, ransomware use and the affected versions.

8.2CVE-2026-15999legion of the bouncy castle inc.bc-csharp
EPSS score
0.23%
Improper validation of integrity check value in the AES-CCM implementation (CcmParameters and CcmBlockCipher) in Legion of the Bouncy Castle Inc. bc-csharp before 2.7.0 allows an on-path attacker to modify CCM-encrypted content without detection via an AlgorithmIdentifier whose CCMParameters declare an authentication tag (aes-ICVlen) of zero or another length outside the RFC 5084 set, because CcmParameters accepted any value and CcmBlockCipher validated the tag length only when encrypting, so decryption compared a zero-length or very short tag. Affected paths include ParameterUtilities.GetCipherParameters, used by CmsEnvelopedData and CmsEnvelopedDataParser for EnvelopedData encrypted with AES-CCM, and any caller passing an unchecked tag length to CcmBlockCipher for decryption.