Amazon Bedrock AgentCore Input Validation Vulnerability CVE-2026-18830
Amazon Bedrock AgentCore
Insufficient input validation in the Amazon Bedrock AgentCore harness permitted remote users to execute configured tools while bypassing security controls. AWS has addressed the issue without requiring customer action.
disclosed CVENo confirmed exploitation, so this record is tracked as a disclosed vulnerability and not counted as an incident. It moves into the counts if CISA or the vendor confirms exploitation. Why
- CVSS
- 8.6
- EPSS
- 0.01 · top 57% · 2026-11-13
- fix status
- Fix status unknown
- first report
- 4 Aug 2026
- last update
- 4 Aug 2026
- CVE ids
Timeline · 1
Sources · 1
Advisories and databases
- 2026-08-04CVE-2026-18830: Insufficient input validation in Amazon Bedrock AgentCore harness might allow an authenticated remote user to execute configured…NVD · nvd.nist.gov/vuln/detail/CVE-2026-18830
Titles and links belong to their publishers. The summary above is written by gcdRadar in its own words; data is CC BY-SA 4.0.
Classification
- lane
- Patch now
- AI role
- Attack on AI
- categories
- Infrastructure vulnerability
- severity
- 2 · Disclosed vulnerability
- fix status
- Fix status unknown
- targets
- Amazon
- owasp llm top 10
- LLM03:2025 Supply Chain
- mitre atlas
- no technique for these categories
- tags
- input-validation
- dates
- happened 4 Aug 2026 · first reported 4 Aug 2026
- origin
- NVDVulnerability record from NVD / the GitHub Advisory Database. This product uses the NVD API but is not endorsed or certified by the NVD.
- record
- confidence 0.95 · created 2026-10-18 06:33Z · updated 2026-10-18 06:33Z
Lane, AI role, categories and severity come from the classifier; the OWASP and ATLAS rows are derived from the categories. How these are assigned
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the brief as text
# Amazon Bedrock AgentCore Input Validation Vulnerability CVE-2026-18830 https://gcdradar.vercel.app/incidents/amazon-bedrock-agentcore-input-validation-vulnerability-cve · AIR-2026-0061 · closed 2026-08-04 - Lane: Patch now - Severity: 2 (Disclosed vulnerability) - Fix status: Fix status unknown - First reported: 2026-08-04 - AI role: Attack on AI - Products: Amazon Bedrock AgentCore - CVE ids: CVE-2026-18830 - CVSS: 8.6 ## Summary Insufficient input validation in the Amazon Bedrock AgentCore harness permitted remote users to execute configured tools while bypassing security controls. AWS has addressed the issue without requiring customer action. ## What to do No action recorded; read the sources below and the vendor's advisory. ## Latest updates - 2026-08-04: CVE-2026-18830: Insufficient input validation in Amazon Bedrock AgentCore harness might allow an authenticated remote user to execute configured… (https://nvd.nist.gov/vuln/detail/CVE-2026-18830) ## Sources - 2026-08-04 NVD: CVE-2026-18830: Insufficient input validation in Amazon Bedrock AgentCore harness might allow an authenticated remote user to execute configured… https://nvd.nist.gov/vuln/detail/CVE-2026-18830 Verify against the vendor's advisory before changing production. Data CC BY-SA 4.0, https://gcdradar.vercel.app.
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