{"id":"CVE-2026-103601","published":"2026-10-02T08:17:00.527","lastModified":"2026-10-02T18:17:00.280","description":"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.","cvssScore":null,"cvssSeverity":null,"cvssVector":null,"cwes":["CWE-354"],"vendors":[],"products":[],"references":[{"url":"https://github.com/bcgit/bc-csharp/commit/4ddb1d0bfeae3a81b18f4446d8cc8a7871bd2d9f","tags":[]},{"url":"https://github.com/bcgit/bc-csharp/commit/e0868323645a063cb2479646e93c1449dc338de5","tags":[]},{"url":"https://github.com/bcgit/bc-csharp/wiki/CVE-2026-103601","tags":[]}],"exploitRefs":[{"url":"https://github.com/bcgit/bc-csharp/commit/4ddb1d0bfeae3a81b18f4446d8cc8a7871bd2d9f","tags":[]},{"url":"https://github.com/bcgit/bc-csharp/commit/e0868323645a063cb2479646e93c1449dc338de5","tags":[]},{"url":"https://github.com/bcgit/bc-csharp/wiki/CVE-2026-103601","tags":[]}],"hasPoc":true,"ai":null}