CVE-2026-11393

Description

Improper neutralization of triple-quote characters during Python code generation in AgentCore CLI before v0.14.2 might allow an authenticated remote threat actor to execute arbitrary code on AWS AgentCore Runtime under the imported agent's IAM execution role and on the local environment of another user in the same AWS account, via a crafted collaborationInstruction stored on a Bedrock Agent collaborator and later processed by that other user during agent import. To remediate this issue, users should upgrade to version 0.14.2.

Description (MITRE) cveawg.mitre.org

Pulled from cveawg.mitre.org/api/cve/CVE-2026-11393 on 2026-06-30. Shown when MITRE's text differs from the cvelistV5 mirror.

Improper neutralization of triple-quote characters during Python code generation in AgentCore CLI before v0.14.2 might allow an authenticated remote threat actor to execute arbitrary code on AWS AgentCore Runtime under the imported agent's IAM execution role and on the local environment of another user in the same AWS account, via a crafted collaborationInstruction stored on a Bedrock Agent collaborator and later processed by that other user during agent import. To remediate this issue, users should upgrade to version 0.14.2.

Overview

State

—

Assigner (CNA)

—

CVSS severity

critical

CVSS score

—

CVSS vector

AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H

Effective score

9.0 / 10 CRITICAL source: NVD

CWE(s)

—

Reserved

—

Published

—

Last updated

—

Source

https://www.tenable.com/cve/CVE-2026-11393

Linked Threat

CVE-2026-11393 — CVE-2026-11393

NVD triage scoring NVD CVE 2.0

Layer NVD adds on top of the CNA's CVE record — published / last-modified timestamps, exploitability / impact subscores, and the FIRST.org EPSS probability that this CVE will be exploited in the wild in the next 30 days.

NVD published

2026-06-08 19:16:41 UTC

NVD last modified

2026-06-17 10:13:59 UTC

NVD CVSS v3.1

9.0 / 10 CRITICAL source: ff89ba41-3aa1-4d27-914a-91399e9639e5

NVD CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H

Exploitability subscore

2.3 / 10

Impact subscore

6.0 / 10

EPSS score

0.0034 (probability of exploitation in next 30 days)

EPSS percentile

25.85% vs all CVEs — higher = more likely to be exploited, as of 2026-06-29

NVD-assigned CWE(s): CWE-94 (differs from the CNA list above)

European Union Vulnerability Database ENISA EUVD

ENISA's official EU repository for curated vulnerability intelligence. Carries a separate identifier (EUVD-YYYY-NNNN) and frequently exposes an earlier-published description + CVSS than NVD does.

EUVD ID

EUVD-2026-35187

Assigner

AMZN

Published

Jun 8, 2026, 6:38:03 PM

Updated

Jun 8, 2026, 7:45:58 PM

EUVD base score (CVSS 4.0)

8.8 / 10
CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:A/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H

EUVD-reported EPSS

0.3200

Vendors

aws

Products

AgentCore CLI (0.3.0-preview.7.0 ≤1.0.0-preview.8)

AgentCore CLI (0.4.0 ≤0.14.1)

Aliases

GHSA-m4x6-gwgp-4pm7

ENISA description: Improper neutralization of triple-quote characters during Python code generation in AgentCore CLI before v0.14.2 might allow an authenticated remote threat actor to execute arbitrary code on AWS AgentCore Runtime under the imported agent's IAM execution role and on the local environment of another user in the same AWS account, via a crafted collaborationInstruction stored on a Bedrock Agent collaborator and later processed by that other user during agent import. To remediate this issue, users should upgrade to version 0.14.2.

Vendor references (0)

References embedded in the original CVE record by the assigning CNA.

None in the CVE record.

Web references (7)

DuckDuckGo results ranked by threat-intel / vendor advisory domains. Generated by the 🔎 Find references (web) button above — same flow as the Remediations search.

• https://aws.amazon.com/security/security-bulletins/2026-040-aws/ tenable:aws.amazon.com
• https://github.com/aws/agentcore-cli/releases/tag/v0.14.2 tenable:github.com
• https://github.com/aws/agentcore-cli/security/advisories/GHSA-m4x6-gwgp-4pm7 tenable:github.com
• https://nvd.nist.gov/vuln/detail/CVE-2026-11393 tenable:nvd.nist.gov
• https://www.cve.org/CVERecord?id=CVE-2026-11393 tenable:www.cve.org
• https://www.npmjs.com/package/@aws/agentcore/v/0.14.2 tenable:www.npmjs.com
• https://www.npmjs.com/package/@aws/agentcore/v/1.0.0-preview.9 tenable:www.npmjs.com

Remediations are stored against the linked Threat row; the list below is deduplicated across both pages.

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