Broken or risky cryptographic algorithm in AWS S3 Encryption Client for Java
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 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.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00118 1st percentileScored 2026-11-07
Fix Fixed S3 Encryption Client for Java (AWS): 4.0.0software.amazon.encryption.s3:amazon-s3-encryption-client-java (Maven): 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 Java | — | 4.0.0 | Patch available | CNA |
| — | software.amazon.encryption.s3:amazon-s3-encryption-client-java (Maven) | before 4.0.0 | 4.0.0 | Patch available | GHSA-x44p-gvrj-pj2r |
- S3 Encryption Client for Java VendorAWS Affected — Fixed in 4.0.0 Patch available CNA
- software.amazon.encryption.s3:amazon-s3-encryption-client-java (Maven) Vendor— Affected before 4.0.0 Fixed in 4.0.0 Patch available GHSA-x44p-gvrj-pj2r
Remediation
- Fix · CNA S3 Encryption Client for Java (AWS) Fixed in 4.0.0
- Fix · GHSA-x44p-gvrj-pj2r software.amazon.encryption.s3:amazon-s3-encryption-client-java (Maven) Fixed in 4.0.0 Advisory →
Timeline
- 2026-10-02 Threatist record created from CVE-2025-14763
- 2026-10-03 Alias added: GHSA-x44p-gvrj-pj2r
References
Advisory 3
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Sources
- CVE-2025-14763 · CVE Program
- CVE-2025-14763 · NVD
- FIRST EPSS
- GHSA-x44p-gvrj-pj2r · GitHub Advisory Database · CC BY 4.0
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