OESA-2026-3869 aws-sdk-cpp security update

The AWS SDK for C++ provides a modern C++ version C++ 11 or later interface for Amazon Web Services AWS. This package contains the S3 component. Security Fixes: Missing cryptographic key commitment in the AWS SDK for C++ may allow a user with write access to the S3 bucket to introduce a new EDK...

OESA-2026-3689 aws-sdk-cpp security update

The AWS SDK for C++ provides a modern C++ version C++ 11 or later interface for Amazon Web Services AWS. This package contains the S3 component. Security Fixes: Missing cryptographic key commitment in the AWS SDK for C++ may allow a user with write access to the S3 bucket to introduce a new EDK...

OESA-2026-3688 aws-sdk-cpp security update

The AWS SDK for C++ provides a modern C++ version C++ 11 or later interface for Amazon Web Services AWS. This package contains the S3 component. Security Fixes: Missing cryptographic key commitment in the AWS SDK for C++ may allow a user with write access to the S3 bucket to introduce a new EDK...

OESA-2026-3687 aws-sdk-cpp security update

The AWS SDK for C++ provides a modern C++ version C++ 11 or later interface for Amazon Web Services AWS. This package contains the S3 component. Security Fixes: Missing cryptographic key commitment in the AWS SDK for C++ may allow a user with write access to the S3 bucket to introduce a new EDK...

AWS Encryption SDK for Python: Key commitment policy bypass via shared key cache

SummaryAWS Encryption SDK ESDK for Python is a client-side encryption library. An issue exists where, under certain circumstances, a specific cryptographic algorithm downgrade in the caching layer might allow an authenticated local threat actor to bypass key commitment policy enforcement via a...

PYSEC-2026-2387 AWS Encryption SDK for Python: Key commitment policy bypass via shared key cache

Summary AWS Encryption SDK ESDK for Python is a client-side encryption library. An issue exists where, under certain circumstances, a specific cryptographic algorithm downgrade in the caching layer might allow an authenticated local threat actor to bypass key commitment policy enforcement via a...

PT-2026-59067

Summary AWS Encryption SDK ESDK for Python is a client-side encryption library. An issue exists where, under certain circumstances, a specific cryptographic algorithm downgrade in the caching layer might allow an authenticated local threat actor to bypass key commitment policy enforcement via a...

GHSA-V638-38FC-RHFV AWS Encryption SDK for Python: Key commitment policy bypass via shared key cache

Summary AWS Encryption SDK ESDK for Python is a client-side encryption library. An issue exists where, under certain circumstances, a specific cryptographic algorithm downgrade in the caching layer might allow an authenticated local threat actor to bypass key commitment policy enforcement via a...

AWS Encryption SDK for Python: Key commitment policy bypass via shared key cache

Summary AWS Encryption SDK ESDK for Python is a client-side encryption library. An issue exists where, under certain circumstances, a specific cryptographic algorithm downgrade in the caching layer might allow an authenticated local threat actor to bypass key commitment policy enforcement via a...

EUVD-2026-23943

AWS Encryption SDK for Python: Key commitment policy bypass via shared key cache...

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...

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...

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...

CVE-2026-6550: Selection of Less-Secure Algorithm During Negotiation

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...

Missing Cryptographic Key Commitment

aws-sdk-s3 is vulnerable to Missing Cryptographic Key Commitment. The vulnerability is due to improper validation of encrypted data keys when stored in instruction files instead of S3 metadata, which allows an attacker with write access to the S3 bucket to introduce a malicious EDK that decrypts ...

Missing Cryptographic Key Commitment

aws/aws-sdk-php is vulnerable to missing cryptographic key commitment. The vulnerability is due to improper handling of encrypted data keys when stored in instruction files instead of S3 metadata, which allows an attacker with write access to the S3 bucket to introduce a malicious EDK that decryp...

Missing Cryptographic Key Commitment

github.com/aws/amazon-s3-encryption-client-go is vulnerable to missing cryptographic key commitment. The vulnerability is due to improper validation of encrypted data keys when stored in instruction files instead of metadata, which allows an attacker with write access to the S3 bucket to introduc...

Missing Cryptographic Key Commitment

software.amazon.encryption.s3, amazon-s3-encryption-client-java is vulnerable to missing cryptographic key commitment. The vulnerability is due to improper validation of encrypted data keys when stored in instruction files instead of metadata, which allows an attacker with write access to the S3...

Missing Cryptographic Key Commitment

Amazon.Extensions.S3.Encryption is vulnerable to Missing Cryptographic Key Commitment. The vulnerability is due to lack of cryptographic key commitment when storing encrypted data keys in instruction files instead of S3 metadata, which allows an attacker with write access to the bucket to introdu...