CVE-2026-3337
5.9
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
Summary
Observable timing discrepancy in AES-CCM decryption in AWS-LC allows an unauthenticated user to potentially determine authentication tag validity via timing analysis.
The impacted implementations are through the EVP CIPHER API: EVP_aes_128_ccm, EVP_aes_192_ccm, and EVP_aes_256_ccm.
Customers of AWS services do not need to take action. Applications using AWS-LC should upgrade to AWS-LC version 1.69.0.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| AWS | AWS-LC | 1.21.0 < 1.69.0 | affected |
| AWS | AWS-LC-FIPS | 3.0.0 < 3.2.0 | affected |
Weaknesses
- CWE-208: CWE-208 (Observable Timing Discrepancy)
ADP Enrichment
CISA ADP Vulnrichment
- SSVC:
- Exploitation: none
- Automatable: no
- Technical Impact: partial
References
- https://aws.amazon.com/security/security-bulletins/2026-005-AWS/
- https://github.com/aws/aws-lc/releases/tag/v1.69.0
- https://github.com/aws/aws-lc/security/advisories/GHSA-frmv-5gcm-jwxh
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