Vulnerability · Published Dec 17, 2025 · Assigned by AMZN
CVE-2025-14764
Medium 5.3
In plain English
A medium-severity broken cryptography in S3 Encryption Client for Go from AWS. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.1% (higher than 1% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
Missing cryptographic key commitment in the Amazon S3 Encryption Client for Go 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 Go to version 4.0 or later.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Go | github.com/aws/amazon-s3-encryption-client-go | no fix listed | GO-2025-4250 |
| Go | github.com/aws/amazon-s3-encryption-client-go/v3 | 4.0.0 | GHSA-3g75-q268-r9r6 |
| Go | github.com/aws/amazon-s3-encryption-client-go/v3 | no fix listed | GO-2025-4250 |
| Go | github.com/aws/amazon-s3-encryption-client-go/v4 | 4.0.0 | GO-2025-4250 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| AWS | S3 Encryption Client for Go | see references |
Weakness: CWE-327 · Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:N