CVE-2026-18830 (GCVE-0-2026-18830)
Vulnerability from cvelistv5 – Published: 2026-08-04 17:42 – Updated: 2026-10-11 20:09 Exclusively Hosted Service
VLAI
EPSS
VEX
Title
Insufficient input validation in Amazon Bedrock AgentCore harness InvokeHarness API
Summary
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.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-04 18:50 UTC
CWE
- CWE-1287 - Improper validation of specified type of input
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://aws.amazon.com/security/security-bulletin… | vendor-advisory |
Impacted products
1 product
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| AWS | Amazon Bedrock AgentCore harness |
Affected:
N/A
(custom)
cpe:2.3:a:aws:amazon_bedrock_agentcore_harness:n_a:*:*:*:*:*:*:* |
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Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
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The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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