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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 decrypted to multiple different plaintexts. To remediate this issue, users should upgrade to version 3.3.1, 4.0.5 or above.

CVSS 4.0 · 5.7 Medium EPSS < 1% KEV · Not listed
Vendors
Amazon
Products
Aws Encryption Sdk For Python
CVE-2024-23680

AWS Encryption SDK for Java Improper Verification of Cryptographic Signature

AWS Encryption SDK for Java versions 2.0.0 to 2.2.0 and less than 1.9.0 incorrectly validates some invalid ECDSA signatures.

CVSS 3.1 · 5.3 Medium EPSS < 1% KEV · Not listed
Vendors
Amazon
Products
Aws Encryption Sdk
CVE-2020-8897

Robustness weakness in AWS KMS and Encryption SDKs

A weak robustness vulnerability exists in the AWS Encryption SDKs for Java, Python, C and Javalcript prior to versions 2.0.0. Due to the non-committing property of AES-GCM (and other AEAD ciphers such as AES-GCM-SIV or (X)ChaCha20Poly1305) used by the SDKs to encrypt messages, an attacker can craft a unique cyphertext which will decrypt to multiple different results, and becomes especially relevant in a multi-recipient setting. We recommend users update their SDK to 2.0.0 or later.

CVSS 3.1 · 4.8 Medium EPSS < 1% KEV · Not listed
Vendors
Amazon
Products
Aws Encryption Sdk