CVE-2026-3337
Timing Side-Channel in AES-CCM Tag Verification in AWS-LC
CVSS Score
5.9
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-208 |
| Vendor | aws |
| Product | aws-lc |
| Published | Mar 2, 2026 |
| Last Updated | Mar 3, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
High
Availability
None
Affected Versions
AWS / AWS-LC
1.21.0 < 1.69.0
AWS / AWS-LC-FIPS
3.0.0 < 3.2.0