CVE-2026-18830

high

Description

Insufficient input validation in Amazon Bedrock AgentCore harness might allow an authenticated remote user to execute configured tools bypassing model invocation and security controls via crafted content blocks in conversation messages. AWS has addressed this issue. No customer action is required.

References

https://aws.amazon.com/security/security-bulletins/2026-073-aws/

https://thehackernews.com/2026/08/aws-google-and-vercel-patch-agent-flaws.html

https://github.com/huzjie/aegisagent

https://github.com/sm-ard/devops-pulse

Details

Source: Mitre, NVD

Published: 2026-08-04

Updated: 2026-08-06

Risk Information

CVSS v2

Base Score: 8.5

Vector: CVSS2#AV:N/AC:L/Au:S/C:C/I:C/A:N

Severity: High

CVSS v3

Base Score: 8.1

Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

Severity: High

CVSS v4

Base Score: 8.6

Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N

Severity: High

EPSS

EPSS: 0.00291