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TI-2026-15951 Aliases CVE-2026-19642

Out-of-bounds write in the Base64 decoder in Amazon aws-sdk-cpp

Priority LOW 27CWE-787Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
High
Attack requirements
Present
Impact type
—
Confidentiality · integrity · availability
None · Low · High
Fix status
No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA.

Summary

An out-of-bounds write issue in the Base64 decoder in Amazon aws-sdk-cpp before 1.11.862 might allow a remote authenticated user to cause a crash or heap memory corruption in an application that processes crafted Base64-encoded input. To remediate this issue, users should upgrade to version 1.11.862.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00502 43rd percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
AWSaws-sdk-cppup to 1.11.861—No fix listedCNA
  • aws-sdk-cpp VendorAWS Affected up to 1.11.861 Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:amazon:aws_software_development_kit:*:*:*:*:*:c\+\+:*:*before 1.11.862VulnerableAWS
  • cpe:2.3:a:amazon:aws_software_development_kit:*:*:*:*:*:c\+\+:*:* Versions before 1.11.862 Vulnerable ·AWS

Remediation

No fixed version listed by the sources yet.

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Advisory ·

    aws-sdk-cpp — aws.amazon.com/security/security-bulletins/2026-080-aws

    2 records Highest priority Priority LOW 2 LOW

    Other records, highest priority first

    • TI-2026-15952 Out-of-bounds read in the Base64 decoder in Amazon aws-sdk-cpp on signed-char platformsPriority LOW 28
    Show all 2 records → Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-19642

References

Patch 1

Advisory 2

  • TI-2022-04321 AWS SDK XML Parser XpathUtils.java XpathUtils server-side request forgery CVSS 3.1CRITICAL 9.8
  • TI-2018-14164 Amazon AWS SDK <=2.8.5 for Android uses Android SharedPreferences to store plain text AWS… CVSS 3.0HIGH 7.2
  • TI-2026-15952 Out-of-bounds read in the Base64 decoder in Amazon aws-sdk-cpp on signed-char platforms CVSS 4.0MEDIUM 6.0
  • TI-2023-28302 Potential URI resolution path traversal in the AWS SDK for PHP CVSS 3.1MEDIUM 6.0
  • TI-2022-02384 Exposure of unencrypted plaintext hash in github.com/aws/aws-sdk-go CVSS 3.1MEDIUM 4.3

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences