CVE-2026-18830
Authenticated users can bypass Bedrock AgentCore controls to execute configured tools.
Is CVE-2026-18830 being exploited?
Not confirmed. CVE-2026-18830 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.53% probability of exploitation in the next 30 days.
How severe is CVE-2026-18830?
CVE-2026-18830 is rated High with a CVSS score of 8.6. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-18830?
Yes. A fix has been recorded for CVE-2026-18830. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-18830 affect?
CVE-2026-18830 affects Amazon Bedrock AgentCore harness, AWS Bedrock. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-18830?
Confirm AWS remediation applied, review Bedrock logs, rotate credentials if suspicious.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Authenticated remote users can execute configured tools by sending crafted conversation content, bypassing model invocation and security controls.
Monitor only