CVE-2025-14763 Amazon S3 Encryption Client for Java has a Key Commitment Issue
A user with write access can manipulate encrypted data keys in instruction files, potentially causing decryption to different plaintexts.
- 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-2025-14763?
CVE-2025-14763 is a medium-severity vulnerability in AWS S3 Encryption Client for Java, 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 Amazon S3 Encryption Client for Java 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 Java to version 4.0.0 or later.
Weakness: CWE-327
Which versions are affected by CVE-2025-14763?
2 open source packages ship an affected version, including software.amazon.encryption.s3:amazon-s3-encryption-client-java.
| Package | Affected | Fixed in |
|---|---|---|
software.amazon.encryption.s3:amazon-s3-encryption-client-java Maven | All versions | 4.0.0 |
software.amazon.encryption.s3:amazon-s3-encryption-client-java Maven | All versions | 4.0.0 |
How do I fix CVE-2025-14763?
Upgrade software.amazon.encryption.s3:amazon-s3-encryption-client-java to 4.0.0 or later.
Is CVE-2025-14763 being exploited?
There is no known exploitation of CVE-2025-14763 in the wild and no public exploit code.
Sources
Also known as CLEANSTART-2026-EK12616, CLEANSTART-2026-NG64025, GHSA-x44p-gvrj-pj2r, ROOT-APP-MAVEN-CVE-2025-14763.