CVE-2026-6550

The vulnerability CVE-2026-6550 affects the AWS Encryption SDK for Python in its caching layer. A cryptographic downgrade in the key cache could allow an authenticated local actor to bypass key commitment policy enforcement, enabling ciphertext to be decrypted into multiple possible plaintexts. A...

CVE-2026-6550 Key commitment policy bypass via shared key cache in AWS Encryption SDK for Python

Cryptographic algorithm downgrade in the caching layer of Amazon AWS Encryption SDK for Python before version 3.3.1 and before version 4.0.5 might allow an authenticated local threat actor to bypass key commitment policy enforcement via a shared key cache, resulting in ciphertext that can be...