Broken or risky cryptographic algorithm in AWS S3 Encryption Client for Go
Priority LOW 26CWE-327Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Attack requirements
- Present
- Impact type
- Information disclosure
- Confidentiality · integrity · availability
- None · High · None
- Fix status
- Fixed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA and GitHub. Impact type from CWE-327.
Summary
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.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00108 1st percentileScored 2026-11-07
Fix Fixed S3 Encryption Client for Go (AWS): 4.0github.com/aws/amazon-s3-encryption-client-go/v3 (Go): 4.0.0
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| AWS | S3 Encryption Client for Go | — | 4.0 | Patch available | CNA |
| — | github.com/aws/amazon-s3-encryption-client-go/v3 (Go) | before 4.0.0 | 4.0.0 | Patch available | GHSA-3g75-q268-r9r6 |
- S3 Encryption Client for Go VendorAWS Affected — Fixed in 4.0 Patch available CNA
- github.com/aws/amazon-s3-encryption-client-go/v3 (Go) Vendor— Affected before 4.0.0 Fixed in 4.0.0 Patch available GHSA-3g75-q268-r9r6
Remediation
- Fix · CNA S3 Encryption Client for Go (AWS) Fixed in 4.0
- Fix · GHSA-3g75-q268-r9r6 github.com/aws/amazon-s3-encryption-client-go/v3 (Go) Fixed in 4.0.0 Advisory →
Timeline
- 2026-10-02 Threatist record created from CVE-2025-14764
- 2026-10-03 Alias added: GHSA-3g75-q268-r9r6
References
Advisory 3
More AWS vulnerabilities
- TI-2026-23989 crypto: algif_aead - Revert to operating out-of-place KEVCVSS 3.1HIGH 7.8
- TI-2023-23979 The HTTP/2 protocol allows a denial of service (server resource consumption) because… KEVCVSS 3.1HIGH 7.5
- TI-2024-18648 Amazon AWS Amplify CLI before 12.10.1 incorrectly configures the role trust policy of IAM… CVSS 3.1CRITICAL 9.8
- TI-2024-05929 Openssh: regresshion - race condition in ssh allows rce/dos CVSS 3.1HIGH 8.1
- TI-2025-03847 Input validation issue in AWS Amplify Studio UI component properties CVSS 4.0CRITICAL 9.0
- TI-2026-11603 HTTP/2 Stream Parser Confusion Body-Inspection Bypass in Amazon CloudFront with AWS WAF CVSS 4.0HIGH 7.9
Sources
- CVE-2025-14764 · CVE Program
- CVE-2025-14764 · NVD
- FIRST EPSS
- GHSA-3g75-q268-r9r6 · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences