CVE-2026-19643CWE-125

CVE-2026-19643

Medium · published August 13, 2026

CVSS v3.1
5.3
EPSS
1%
Percentile
46.2
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
5.3 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
CVSS v4.0
Not supplied
EPSS
0.00565 · 46.2th percentile
Weakness
CWE-125 · Out-of-bounds Read
Published
2026-08-13T00:17Z
Affected products (1)
ProductVersionsFixed in
amazon/aws_software_development_kit< 1.11.8621.11.862
References (3)
https://aws.amazon.com/security/security-bulletins/2026-080-aws/ · ff89ba41-3aa1-4d27-914a-91399e9639e5https://github.com/aws/aws-sdk-cpp/releases/tag/1.11.862 · ff89ba41-3aa1-4d27-914a-91399e9639e5https://github.com/aws/aws-sdk-cpp/security/advisories/GHSA-mxm9-xpf9-x66x · ff89ba41-3aa1-4d27-914a-91399e9639e5
EPSS history
Timeline
  • 12 AUG 19:38Z
    Out-of-bounds read in the Base64 decoder in Amazon aws-sdk-cpp on signed-char platforms
    cvelistv5