RewindexCVEsAmazon Web Services
CVE-2026-19643: Out-of-bounds read in the Base64 decoder in Amazon aws-sdk-cpp on signed-char platforms
Medium · CVSS 5.3 (CVSS 3.1)EPSS 0.57%, 47th percentilePublished Updated Assigner: AMZN
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.
Vector CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H · CWE-125
Tracked companies
Mapped from the CVE’s affected-product data, NVD CPE matches, vendor advisories or package feeds. A mapping means the vendor’s software is named, not that its hosted service was exposed.
Status incidents that name it
No tracked status incident names this CVE.
Affected vendors and products
AWS: aws-sdk-cpp
References
- CVE record on cve.org (opens in new tab)
- NVD entry (opens in new tab)
- aws.amazon.com/security/security-bulletins/2026-080-aws/ (opens in new tab)
- github.com/aws/aws-sdk-cpp/releases/tag/1.11.862 (opens in new tab)
- github.com/aws/aws-sdk-cpp/security/advisories/GHSA-mxm9-xpf9-x66x (opens in new tab)
- CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (opens in new tab)
- This product uses data from the NVD API but is not endorsed or certified by the NVD. (opens in new tab)
- Known Exploited Vulnerabilities catalog from CISA. (opens in new tab)
- EPSS scores from FIRST (Exploit Prediction Scoring System). (opens in new tab)