CVE-2026-18830
Insufficient input validation in Amazon Bedrock AgentCore harness InvokeHarness API
- State
- Published
- Severity
- 8.6 High
- Published
- Aug 4, 2026
- Updated
- Oct 11, 2026
- Reserved
- Aug 4, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 8.6 High | 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 | AMZN |
| 3.1 | 8.1 High | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N | AMZN |
Weaknesses
- CWE-1287 Improper validation of specified type of input
Affected Products
| Product | Versions |
|---|---|
Amazon Bedrock AgentCore harnessAWS |
|
References
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