CVE-2026-19643: Out-of-bounds read in the Base64 decoder in Amazon aws-sdk-cpp on signed-char platforms
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 Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
Amazon aws-sdk-cppto a version that resolves this vulnerability.Fixed in 1.11.862
Event History
Frequently Asked Questions
What is the severity of CVE-2026-19643?
The severity of CVE-2026-19643 is medium, rated at 5.3.
What type of vulnerability is CVE-2026-19643?
CVE-2026-19643 is an out-of-bounds read vulnerability in the Base64 decoder of the aws-sdk-cpp.
How do I fix CVE-2026-19643?
To fix CVE-2026-19643, upgrade to aws-sdk-cpp version 1.11.862 or later.
What platforms are affected by CVE-2026-19643?
CVE-2026-19643 affects signed-char platforms running versions of aws-sdk-cpp before 1.11.862.
What is the impact of CVE-2026-19643?
The impact of CVE-2026-19643 may allow a remote authenticated user to crash applications that process crafted Base64-encoded input.