CVE-2026-19643

MEDIUM

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

Title source: CVE List
STIX 2.1 vulnerability

Record summary

CVE-2026-19643 has a selected CVSS score of 6.0 (medium).

Description

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.

Description source: CVE List

Exploitation context

CISA SSVC decision

ExploitationNone
AutomatableNo
Technical impactPartial

CISA Coordinator · SSVC 2.0.3 · Evaluated Aug 13, 2026 · Source: CVE List

Affected products and versions

1
ProductSourceVersion range

aws-sdk-cpp

Browse AWS / aws-sdk-cpp

Default status: unaffected

CVE ListThrough 1.11.861affected

References

3