CVE-2026-18830 — HIGH (8.1)

Vulnerability 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.

CVSS Score

8.1

HIGH

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

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

HIGH

Integrity

HIGH

Availability

NONE

Related Weaknesses (CWE)

CWE-1287

References

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

FAQ

What is CVE-2026-18830?

CVE-2026-18830 is a vulnerability with a CVSS score of 8.1 (HIGH). 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 cont...

How severe is CVE-2026-18830?

CVE-2026-18830 has been rated HIGH with a CVSS base score of 8.1/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-18830?

Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.