CVE-2026-19643 MEDIUM

CVE-2026-19643: Out-of-bounds read in the Base64 decoder in Amazon aws-sdk-cpp on signed-char platforms

Vendor Aws
Product aws-sdk-cpp
Weakness CWE-125
Published August 12, 2026
Last update August 12, 2026
View on NVD All CVEs

CVSS base score

5.3/10
Attack vector Network
Attack complexity High
Privileges required Low
User interaction None
Confidentiality None
Integrity None

CVSS vector

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

August 12, 2026 CVE published