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    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.

    Published:Mar 2, 2026
    Last Modified:Apr 17, 2026
    EPS:Mar 2, 2026
    EPSS Score:0.00039
    CVSS Score:5.9

    Affected Products

    Vendor
    Amazon
    Product
    Aws-lc-fips-sys
    Vendor
    Amazon
    Product
    Aws-lc-sys
    Vendor
    Amazon
    Product
    Aws Libcrypto
    Vendor
    Aws
    Product
    Aws-lc
    Vendor
    Aws
    Product
    Aws-lc-fips

    Exploits

    No exploit reference

    Common Weakness Enumeration

    CWE-208 Observable Timing Discrepancy

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High