{"id":"CVE-2026-18830","published":"2026-08-04T18:16:49.420","lastModified":"2026-08-06T15:46:36.880","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.","cvssScore":8.1,"cvssSeverity":"HIGH","cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N","cwes":["CWE-1287"],"vendors":[],"products":[],"references":[{"url":"https://aws.amazon.com/security/security-bulletins/2026-073-aws/","tags":[]}],"exploitRefs":[],"hasPoc":false,"ai":{"summary":"This flaw allows an authenticated user to bypass security controls by crafting specific content in conversation messages, potentially executing unauthorized tools.","exploitability":"Exploitation requires authentication and knowledge of the crafted content, making it moderately difficult.","blast_radius":"If exploited, the impact is limited to the execution of unauthorized tools within the affected system, potentially leading to data exposure or misuse.","remediation":"Upgrade to the latest version of Amazon Bedrock AgentCore as addressed by AWS.","detection":"No reliable host or network indicator is derivable from the published description.","tags":["auth-bypass","rce","web","aws"],"model":"qwen2.5:7b-instruct","analyzedAt":"2026-10-05T08:45:44.581Z"}}