CVE-2025-14759

Published Dec 17, 2025 CVSS 4.0 · 6 Medium EPSS < 1% KEV · Not listed
Description
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
Github GHSA Github GHSA GHSA-4v42-65r3-3gjx Amazon S3 Encryption Client for .NET has a Key Commitment Issue
History
Type Values Removed Values Added
First Time appeared Amazon
Amazon aws S3 Encryption Client Dotnet
Vendors & Products Amazon
Amazon aws S3 Encryption Client Dotnet
Type Values Removed Values Added
Description The Amazon S3 Encryption Client for .NET is an open-source client-side encryption library used to facilitate writing and reading encrypted records to S3. 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. 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.
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
Description The Amazon S3 Encryption Client for .NET is an open-source client-side encryption library used to facilitate writing and reading encrypted records to S3. 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 4.0.0 or later. The Amazon S3 Encryption Client for .NET is an open-source client-side encryption library used to facilitate writing and reading encrypted records to S3. 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.
Type Values Removed Values Added
Description The Amazon S3 Encryption Client for .NET is an open-source client-side encryption library used to facilitate writing and reading encrypted records to S3. 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 4.0.0 or later.
Weaknesses CWE-327
References
Metrics cvssV3_1

{'score': 5.3, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:N'}

cvssV4_0

{'score': 6, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
AMZN
Published
Updated
Dec 17, 2025, 9:05 PM
Reserved
Dec 16, 2025, 12:24 AM
Status
Deferred
Published
Dec 17, 2025, 8:15 PM
Modified
Jun 17, 2026, 8:36 AM