CVE-2026-19643

6.0 MEDIUM 0.6% exploit odds Fix listed Memory safety Library

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.

At a glance

Exploitability: Can be exploited over the network with a low-privilege account. High risk of service disruption.
Exploit odds: 0.6% chance of exploitation in the next 30 days (EPSS).
Fix: A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

2026-08-12 20:17 UTC PublishedDisclosed publicly on CVE.org and NVD
2026-10-23 19:10 UTC Last updatedMost recent change to the record

Details

Published: 2026-08-12 20:17 UTC
Last modified: 2026-10-23 19:10 UTC
Exploit probability: 0.6% · EPSS, next 30 days
Weakness: CWE-125 · Out-of-bounds read
Record status: Analyzed

Affected

Amazon Aws Software Development Kit < 1.11.862

Attack profile CVSS 4.0 · 6.0

Attack vector: Network
Complexity: High
Attack requirements: Present
Privileges needed: Low
User interaction: None
Confidentiality: None
Integrity: None
Availability: High

Raw vector

CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

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Fix and advisories

References

NVD record · CVE.org record