Release of unverified plaintext in the CCM (CcmBlockCipher) and DSTU 7624 CCM (KCcmBlockCipher) AEAD modes in Legion of the Bouncy Castle Inc. bc-csharp before 2.7.0 allows a remote attacker to obtain decryptions of ciphertexts of their choosing via forged messages sent to an application that lets the output buffer of a failed decryption be observed, for example through buffer reuse or logging, because decryption wrote the recovered plaintext into the caller-supplied output buffer before checking the authentication tag and left it there when the check failed. Only decryption into a caller-supplied buffer is affected; methods that return a newly allocated array are not.
References
Configurations
History
28 Oct 2026, 14:42
| Type | Values Removed | Values Added |
|---|---|---|
| First Time |
Bouncycastle bc-csharp
Bouncycastle |
|
| CPE | cpe:2.3:a:bouncycastle:bc-csharp:*:*:*:*:*:*:*:* | |
| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 7.5 |
| References | () https://github.com/bcgit/bc-csharp/commit/4ddb1d0bfeae3a81b18f4446d8cc8a7871bd2d9f - Patch | |
| References | () https://github.com/bcgit/bc-csharp/commit/e0868323645a063cb2479646e93c1449dc338de5 - Patch | |
| References | () https://github.com/bcgit/bc-csharp/wiki/CVE-2026-103601 - Patch, Vendor Advisory |
02 Oct 2026, 08:17
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2026-10-02 08:17
Updated : 2026-10-28 14:42
NVD link : CVE-2026-103601
Mitre link : CVE-2026-103601
CVE.ORG link : CVE-2026-103601
JSON object : View
Products Affected
bouncycastle
- bc-csharp
CWE
CWE-354
Improper Validation of Integrity Check Value