CVE-2026-19642

EUVD-2026-57522
An out-of-bounds write issue in the Base64 decoder in Amazon aws-sdk-cpp before 1.11.862 might allow a remote authenticated user to cause a crash or heap memory corruption in an application that processes crafted Base64-encoded input.



To remediate this issue, users should upgrade to version 1.11.862.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
5.9 MEDIUM
NETWORK
HIGH
LOW
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:H
Base Score
CVSS 3.x
EPSS Score
Percentile: 40.52%
Affected Products (NVD)
VendorProductVersion
amazonaws_software_development_kit
𝑥
< 1.11.862
𝑥
= Vulnerable software versions
Common Weakness Enumeration
References
https://aws.amazon.com/security/security-bulletins/2026-080-aws/
https://github.com/aws/aws-sdk-cpp/releases/tag/1.11.862
https://github.com/aws/aws-sdk-cpp/security/advisories/GHSA-wxx3-prfc-69xx