CVE-2025-14761 AWS SDK for PHP's S3 Encryption Client has a Key Commitment Issue
Missing key commitment in AWS SDK for PHP allows attackers with write access to manipulate encrypted data keys, potentially compromising data integrity and confidentiality.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2025-14761?
CVE-2025-14761 is a medium-severity vulnerability in AWS SDK for PHP, published on 17 Dec 2025. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Missing cryptographic key commitment in the AWS SDK for PHP 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 AWS SDK for PHP to version 3.368.0 or later
Weakness: CWE-327
Which versions are affected by CVE-2025-14761?
2 open source packages ship an affected version, including aws/aws-sdk-php.
| Package | Affected | Fixed in |
|---|---|---|
aws/aws-sdk-php Packagist | All versions | 3.368.0 |
aws/aws-sdk-php Packagist | All versions | 3.368.0 |
How do I fix CVE-2025-14761?
Upgrade aws/aws-sdk-php to 3.368.0 or later.
Is CVE-2025-14761 being exploited?
There is no known exploitation of CVE-2025-14761 in the wild and no public exploit code.
Sources
Also known as CLSA-2026-1783904626, GHSA-x8cp-jf6f-r4xh, UBUNTU-CVE-2025-14761.