CVE-2026-19643: CWE-125 Out-of-bounds read in AWS aws-sdk-cpp
CVE-2026-19643 is an out-of-bounds read vulnerability in the Base64 decoder of the AWS aws-sdk-cpp library before version 1.11.862. This flaw can cause a remote authenticated user to crash an application processing crafted Base64-encoded input. The issue affects some platforms and results in denial of service due to application crashes. AWS has released version 1.11.862 to remediate this vulnerability.
AI Analysis
Technical Summary
This vulnerability (CWE-125) involves an out-of-bounds read in the Base64 decoding functionality of the aws-sdk-cpp library prior to version 1.11.862. When processing specially crafted Base64-encoded input, the flaw may cause the application to crash, leading to a denial of service condition. The vulnerability requires remote authenticated access and has a CVSS 3.1 base score of 5.3, indicating medium severity. AWS manages this as a cloud service and has published an advisory recommending upgrading to version 1.11.862 to resolve the issue.
Potential Impact
The primary impact is denial of service through application crashes triggered by crafted Base64 input. There is no confidentiality or integrity impact reported. Exploitation requires remote authenticated access and high attack complexity.
Mitigation Recommendations
A fix is available by upgrading aws-sdk-cpp to version 1.11.862 or later. Since this is a cloud service, AWS manages remediation server-side; users should follow the vendor advisory at https://aws.amazon.com/security/security-bulletins/2026-080-aws/ for current guidance.
CVE-2026-19643: CWE-125 Out-of-bounds read in AWS aws-sdk-cpp
Description
CVE-2026-19643 is an out-of-bounds read vulnerability in the Base64 decoder of the AWS aws-sdk-cpp library before version 1.11.862. This flaw can cause a remote authenticated user to crash an application processing crafted Base64-encoded input. The issue affects some platforms and results in denial of service due to application crashes. AWS has released version 1.11.862 to remediate this vulnerability.
CVSS v3.1
Score 5.3medium
Affected software
AWS
aws-sdk-cpp
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CWE-125) involves an out-of-bounds read in the Base64 decoding functionality of the aws-sdk-cpp library prior to version 1.11.862. When processing specially crafted Base64-encoded input, the flaw may cause the application to crash, leading to a denial of service condition. The vulnerability requires remote authenticated access and has a CVSS 3.1 base score of 5.3, indicating medium severity. AWS manages this as a cloud service and has published an advisory recommending upgrading to version 1.11.862 to resolve the issue.
Potential Impact
The primary impact is denial of service through application crashes triggered by crafted Base64 input. There is no confidentiality or integrity impact reported. Exploitation requires remote authenticated access and high attack complexity.
Mitigation Recommendations
A fix is available by upgrading aws-sdk-cpp to version 1.11.862 or later. Since this is a cloud service, AWS manages remediation server-side; users should follow the vendor advisory at https://aws.amazon.com/security/security-bulletins/2026-080-aws/ for current guidance.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- AMZN
- Date Reserved
- 2026-08-12T16:52:29.486Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Is Cloud Service
- true
- Vendor Advisory Urls
- [{"url":"https://aws.amazon.com/security/security-bulletins/2026-080-aws/","vendor":"AWS"}]
Threat ID: 6a7cd124bf8831d53911d048
Added to database: 08/12/2026, 20:01:40 UTC
Last enriched: 08/20/2026, 13:53:21 UTC
Last updated: 09/27/2026, 01:47:40 UTC
Views: 78
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