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    CVE-2026-19643

    An out-of-bounds read issue in the Base64 decoder in Amazon aws-sdk-cpp before 1.11.862, on some platforms, might allow a remote authenticated user to crash an application that processes crafted Base64-encoded input. To remediate this issue, users should upgrade to version 1.11.862.

    Published:Aug 12, 2026
    Last Modified:Aug 18, 2026
    EPS:Aug 12, 2026
    EPSS Score:0.00332
    CVSS Score:5.3

    Affected Products

    Vendor
    Amazon
    Product
    Aws Software Development Kit
    Vendor
    Aws
    Product
    Aws-sdk-cpp

    Exploits

    No exploit reference

    Common Weakness Enumeration

    CWE-125 Out-of-bounds Read

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-540 Overread Buffers

    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