P4Verified

CVE-2026-18830: Amazon Bedrock AgentCore harness N/A

CVE-2026-18830. CVSS 3.1 base score 8.1 (HIGH, Source advisory). EPSS 0.00507 (percentile 0.41429), scored 10-Oct-2026.

Affected technology

Amazon Bedrock AgentCore harness · N/A
AWS

Component: Not specified by the source

Attack conditions (Source advisory, CVSS 4.0): Network (remote) · Low privileges required · No user interaction required

What an attacker can do

An authenticated remote user might execute configured tools bypassing model invocation and security controls via crafted content blocks in conversation messages. Source advisory’s CVSS 4.0 assessment (base score 8.6/10) rates confidentiality and integrity impact as high; availability impact as none.

Published 11-Oct-2026 23:39 UTC

CWE: CWE-1287
CCR priority: 32.5 /100 (P4)
CVSS 3.1: 8.1 /10 · CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N · Source advisory
EPSS: 0.00507 · percentile 0.41472 · 2026-10-11
KEV: no

Provenance

FIRST EPSS daily exploit-probability · Source record · observed 2026-10-11 23:42:05.235979+00:00 UTC
NVD CVE API 2.0 · Source record · observed 2026-10-11 23:39:08.456424+00:00 UTC

Stable permalink: https://cybercodered.org/item/cve-cve-2026-18830.html