# CVE-2026-18830: Insufficient input validation in Amazon Bedrock AgentCore harness InvokeHarness API

> CVE-2026-18830: Insufficient input validation in Amazon Bedrock AgentCore harness InvokeHarness API. CVSS 8.1 (CVSS 3.1).

Canonical: https://rewindex.com/cve/CVE-2026-18830
Last updated: 2026-10-24T16:10:00Z

- Published: 2026-08-04 17:42 UTC · Updated: 2026-10-24 16:10 UTC · Assigner: AMZN
- CVSS: 8.1 (CVSS 3.1) · Severity: High · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
- EPSS: 0.51%, 43th percentile (scored 2026-10-25)
- CISA KEV: no
- CWE: CWE-1287

## 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.

## Affected vendors and products

- AWS: Amazon Bedrock AgentCore harness

## Tracked companies

- [Amazon Web Services](https://rewindex.com/company/aws.md)

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2026-18830)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2026-18830)
- [https://aws.amazon.com/security/security-bulletins/2026-073-aws/](https://aws.amazon.com/security/security-bulletins/2026-073-aws/)

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_Sources: CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (https://www.cve.org/) This product uses data from the NVD API but is not endorsed or certified by the NVD. (https://nvd.nist.gov/) Known Exploited Vulnerabilities catalog from CISA. (https://www.cisa.gov/known-exploited-vulnerabilities-catalog) EPSS scores from FIRST (Exploit Prediction Scoring System). (https://www.first.org/epss/)_


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Canonical: https://rewindex.com/cve/CVE-2026-18830 · Markdown: https://rewindex.com/cve/CVE-2026-18830.md · JSON: https://rewindex.com/api/v1/cves/CVE-2026-18830 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T03:12:04.904Z