CVE-2026-45446

CVE-2026-45446 concerns OpenSSL implementations of AES-SIV (RFC 5297) and AES-GCM-SIV (RFC 8452). The root cause is that the expected authentication tag is computed only when the decryption function processes non-empty data; if a caller provides AAD and then invokes DecryptFinal without any ciphe...

CVE-2026-45446 Incorrect Tag Processing for Empty Messages in AES-GCM-SIV and AES-SIV modes

Issue summary: The implementations of AES-SIV RFC 5297 and AES-GCM-SIV RFC 8452 mishandle the authentication of AAD Additional Authenticated Data with an empty ciphertext allowing a forgery of such messages. Impact summary: An attacker can forge empty messages with arbitrary AAD to the victim's...

PT-2026-47843

Issue summary: The implementations of AES-SIV RFC 5297 and AES-GCM-SIV RFC 8452 mishandle the authentication of AAD Additional Authenticated Data with an empty ciphertext allowing a forgery of such messages. Impact summary: An attacker can forge empty messages with arbitrary AAD to the victim's...