CVE-2026-19643: Amazon Aws Software Development Kit

Medium severity, CVSS 5.3. EPSS: 0.6% chance of exploitation in the next 30 days.

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.

Affected products

• Amazon Aws Software Development Kit: before 1.11.862 (fixed in 1.11.862)

Published 2026-08-12. Last modified 2026-08-18.