# CVE-2026-11393: Code injection via improper triple-quote escaping in AgentCore CLI Bedrock Agent import

> Authenticated attackers can execute arbitrary code via crafted collaboration instructions during agent import, affecting AWS AgentCore Runtime and local environments.

- **Severity:** High 8.8 (`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`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** Yes
- **Published:** 8 Jun 2026
- **Updated:** 8 Jun 2026
- **Also known as:** GHSA-m4x6-gwgp-4pm7

## What is CVE-2026-11393?

CVE-2026-11393 is a high-severity code injection vulnerability in AWS AgentCore CLI, published on 8 Jun 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.

### Official 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.

Weakness: CWE-94 (Improper Control of Generation of Code)

## Which versions are affected by CVE-2026-11393?

6 open source packages ship an affected version, including @aws/agentcore.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `@aws/agentcore` | npm | From 0.3.0-preview.7.0 to 0.3.0-preview.9.0 | None |
| `@aws/agentcore` | npm | From 0.3.0-preview.7.0 to 0.3.0-preview.9.0 | None |
| `@aws/agentcore` | npm | From 0.4.0 | 0.14.2 |
| `@aws/agentcore` | npm | From 0.4.0 | 0.14.2 |
| `@aws/agentcore` | npm | From 1.0.0-preview.1 | 1.0.0-preview.9 |
| `@aws/agentcore` | npm | From 1.0.0-preview.1 | 1.0.0-preview.9 |

## How do I fix CVE-2026-11393?

Upgrade @aws/agentcore to a fixed version for your release line: 0.14.2 or 1.0.0-preview.9.

## Is CVE-2026-11393 being exploited?

There is no known exploitation of CVE-2026-11393 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-11393 and fix it if it is affected.

What it is: CVE-2026-11393 is a high-severity code injection vulnerability in AWS AgentCore CLI, published on 8 Jun 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2026-11393 in the wild and no public exploit code.

Affected packages and fixed versions:
- @aws/agentcore (npm): affected from 0.3.0-preview.7.0 up to 0.3.0-preview.9.0; no fix listed
- @aws/agentcore (npm): affected from 0.3.0-preview.7.0 up to 0.3.0-preview.9.0; no fix listed
- @aws/agentcore (npm): affected from 0.4.0; fixed in 0.14.2
- @aws/agentcore (npm): affected from 0.4.0; fixed in 0.14.2
- @aws/agentcore (npm): affected from 1.0.0-preview.1; fixed in 1.0.0-preview.9
- @aws/agentcore (npm): affected from 1.0.0-preview.1; fixed in 1.0.0-preview.9

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-11393/ (Markdown: https://insights.sbomify.com/CVE-2026-11393/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-11393
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-11393
- OSV: https://osv.dev/vulnerability/CVE-2026-11393

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-11393/
Summaries are generated and may contain mistakes; the official description above is the record.