Is CVE-2026-4269 actively exploited?

No active exploitation of CVE-2026-4269 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-4269 be exploited remotely?

Yes. CVE-2026-4269 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-4269?

CVE-2026-4269 has a CVSS score of 7.5 (HIGH).

HOME VULNERABILITIESCVE-2026-4269

HIGH

CVE-2026-4269

CWE-283Published: March 16, 2026· Updated: Mar 17, 2026

7.5

CVSS v3.1

EPSS:0.05%probability of exploitation in 30 daysPercentile:14.4th

Official Description

A missing S3 ownership verification in the Bedrock AgentCore Starter Toolkit before version v0.1.13 may allow a remote actor to inject code during the build process, leading to code execution in the AgentCore Runtime. This issue only affects users of the Bedrock AgentCore Starter Toolkit before version v0.1.13 who build or have built the Toolkit after September 24, 2025. Any users on a version >=v0.1.13, and any users on previous versions who built the toolkit before September 24, 2025 are not affected.

To remediate this issue, customers should upgrade to version v0.1.13.

NVD Source

Technical Analysis

CVE-2026-4269 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation does not require any privileges, though user interaction (Required) is needed, which slightly reduces the risk of mass automated attacks.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 7.5.