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Bulletin ID: 2026-080-AWS Scope: AWS Content Type: Important (requires attention) Publication Date: 08/12/2026 12:30 PM PDT Description: The AWS SDK for C++ is an open-source library that provides C++ developers with APIs for AWS services. Its core library includes a Base64 codec used by the generated service clients for a variety of features.We identified the following CVEs: - CVE-2026-19642 - Out-of-bounds write in the Base64 decoder in the AWS SDK for C++ - CVE-2026-19643 - Out-of-bounds read in the Base64 decoder in the AWS SDK for C++ For CVE-2026-19642, certain inputs to the Base64 decoder might cause the decoder to write past the end of its heap-allocated output buffer, which might crash or corrupt memory in the process performing the decode. Remote code execution has not been demonstrated. For CVE-2026-19643, certain inputs to the Base64 decoder, on some platforms, might cause the decoder to read outside the bounds of its decode table, which might crash the process performing the decode. For both issues, impact is confined to the process of the application performing the decode. Impacted Versions: AWS SDK for C++: <= 1.11.861 Please refer to the article below for the most up-to-date and complete information related to this AWS Security Bulletin. Join the discussion | CVE Database V5 | 08/20/2026, 21:35:57 UTC Added: 08/12/2026, 20:01:40 UTC |
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. Join the discussion | CVE Database V5 | 08/12/2026, 19:38:00 UTC Added: 08/12/2026, 20:01:40 UTC |
0 Missing cryptographic key commitment in the AWS SDK for C++ may allow a user with write access to the S3 bucket to introduce a new EDK that decrypts to different plaintext when the encrypted data key is stored in an "instruction file" instead of S3's metadata record. To mitigate this issue, upgrade AWS SDK for C++ to version 1.11.712 or later Join the discussion | CVE Database V5 | 12/17/2025, 20:11:37 UTC Added: 12/17/2025, 20:13:30 UTC |
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