Vulnerability Details CVE-2026-3337
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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.001
EPSS Ranking 27.9%
CVSS Severity
CVSS v3 Score 5.9
References
Products affected by CVE-2026-3337
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cpe:2.3:a:aws:aws_libcrypto:*