# CVE-2025-14764: Amazon S3 Encryption Client has a Key Commitment Issue

> A missing key commitment in the Amazon S3 Encryption Client for Go allows attackers with write access to manipulate encrypted data keys, potentially compromising data integrity and confidentiality.

- **Severity:** Medium 6.0 (`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`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 17 Dec 2025
- **Updated:** 17 Dec 2025
- **Also known as:** GHSA-3g75-q268-r9r6, GO-2025-4250

## What is CVE-2025-14764?

CVE-2025-14764 is a medium-severity vulnerability in AWS S3 Encryption Client for Go, 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 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.

Weakness: CWE-327 (Use of a Broken or Risky Cryptographic Algorithm)

## Which versions are affected by CVE-2025-14764?

5 open source packages ship an affected version, including github.com/aws/amazon-s3-encryption-client-go/v3, github.com/aws/amazon-s3-encryption-client-go and github.com/aws/amazon-s3-encryption-client-go/v4.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `github.com/aws/amazon-s3-encryption-client-go/v3` | Go | All versions | None |
| `github.com/aws/amazon-s3-encryption-client-go/v3` | Go | All versions | 4.0.0 |
| `github.com/aws/amazon-s3-encryption-client-go/v3` | Go | All versions | 4.0.0 |
| `github.com/aws/amazon-s3-encryption-client-go` | Go | All versions | None |
| `github.com/aws/amazon-s3-encryption-client-go/v4` | Go | All versions | 4.0.0 |

## How do I fix CVE-2025-14764?

Upgrade github.com/aws/amazon-s3-encryption-client-go/v3 to 4.0.0 or later.

## Is CVE-2025-14764 being exploited?

There is no known exploitation of CVE-2025-14764 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-14764 and fix it if it is affected.

What it is: CVE-2025-14764 is a medium-severity vulnerability in AWS S3 Encryption Client for Go, published on 17 Dec 2025. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2025-14764 in the wild and no public exploit code.

Affected packages and fixed versions:
- github.com/aws/amazon-s3-encryption-client-go/v3 (Go): affected all versions; no fix listed
- github.com/aws/amazon-s3-encryption-client-go/v3 (Go): affected all versions; fixed in 4.0.0
- github.com/aws/amazon-s3-encryption-client-go/v3 (Go): affected all versions; fixed in 4.0.0
- github.com/aws/amazon-s3-encryption-client-go (Go): affected all versions; no fix listed
- github.com/aws/amazon-s3-encryption-client-go/v4 (Go): affected all versions; fixed in 4.0.0

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2025-14764/ (Markdown: https://insights.sbomify.com/CVE-2025-14764/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-14764
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-14764
- OSV: https://osv.dev/vulnerability/CVE-2025-14764

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-14764/
Summaries are generated and may contain mistakes; the official description above is the record.