PatchTheCVECVE-2026-19643: An out-of-bounds read issue in the Base64 decoder in Amazon aws-sdk-cpp before 1.11.862, on some platforms, mi
35
Routine
MEDIUM 5.3WATCHLISTUPGRADE
CVE-2026-19643 is a medium-severity flaw (CVSS 5.3) affecting aws software development kit. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
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.
Why this priority
- On your watchlist
A fixed release or distro patch exists.
Risk facts
| CVSS score | 5.3 (Medium) |
| Attack vector | Network (remote) |
| Attack complexity | High |
| Privileges needed | Low |
| User interaction | None |
| EPSS exploit chance | 0.6% (top 54%) |
| CISA exploited list | No |
| Weakness | CWE-125 |
| Published | 2026-08-12 |
| Last modified | 2026-10-23 |
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
amazon aws software development kit UPGRADE
Affected: < 1.11.862
Fixed in: 1.11.862
Safe to downgrade to: no unaffected older release
1. Check installed version
apt-cache policy aws-software-development-kit || rpm -q aws-software-development-kit || aws-software-development-kit --version
2. UPGRADE to 1.11.862 (Debian / Ubuntu)
sudo apt update && sudo apt install --only-upgrade aws-software-development-kit
2. UPGRADE (RHEL / Amazon Linux / Fedora)
sudo dnf upgrade aws-software-development-kit
Note
Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.
Exact fixes by distribution
Fedora 46 · clementine · FIXED · 1.4.2-1.fc46 · FEDORA-2026-3e748ef4d3 · source
sudo dnf upgrade --advisory=FEDORA-2026-3e748ef4d3
Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Related CVEs
- CVE-2026-19642 MEDIUM 5.9 UPGRADE An out-of-bounds write issue in the Base64 decoder in Amazon aws-sdk-cpp before 1.11.862 might allow a remote