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.

CVSS v3 5.3 MEDIUM

5.3^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 1.6 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://aws.amazon.com/security/security-bulletins/2026-080-aws/	Vendor Advisory
https://github.com/aws/aws-sdk-cpp/releases/tag/1.11.862	Release Notes
https://github.com/aws/aws-sdk-cpp/security/advisories/GHSA-mxm9-xpf9-x66x	Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:amazon:aws_software_development_kit:*:*:*:*:*:c\+\+:*:*

History

No history.

Information

Published : 2026-08-12 20:17

Updated : 2026-08-18 14:34

NVD link : CVE-2026-19643

Mitre link : CVE-2026-19643

CVE.ORG link : CVE-2026-19643

JSON object : View

Products Affected

amazon

aws_software_development_kit

CWE

CWE-125

Out-of-bounds Read

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