CVE-2025-14759

Missing cryptographic key commitment in the Amazon S3 Encryption Client for .NET may allow a user with write access to the S3 bucket to introduce a new EDK that decrypts to different plaintext when the encrypted data key is stored in an "instruction file" instead of S3's metadata record.

To mitigate this issue, upgrade Amazon S3 Encryption Client for .NET to version 3.2.0 or later.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTNIST
5.3 MEDIUM
NETWORK
HIGH
LOW
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:N
AMZNCNA
5.3 MEDIUM
NETWORK
HIGH
LOW
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:N
CISA-ADPADP
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Base Score
CVSS 3.x
EPSS Score
Percentile: Unknown
Common Weakness Enumeration
References
https://aws.amazon.com/security/security-bulletins/AWS-2025-032/
https://github.com/aws/amazon-s3-encryption-client-dotnet/releases/tag/release_2025-12-17
https://github.com/aws/amazon-s3-encryption-client-dotnet/security/advisories/GHSA-4v42-65r3-3gjx