# CVE-2026-113663: AG2: Newline injection in SandboxShellTool bypasses allowed=[...] and readonly=True, enabling arbitrary command execution

Status: published. Published: 2026-11-05. Updated: 2026-11-05.

AG2 is an open-source AgentOS. From 0.13.2 until ag2 1.1.1, and from autogen 0.13.2 to 0.14.1, SandboxShellTool configurations using allowed=[...] or readonly=True rely on ShellAdapter._filter and contains_shell_operator in ag2/tools/sandbox/filter.py and ag2/tools/sandbox/adapter/shell.py to validate a command prefix and reject selected shell syntax. The filter omits newline and carriage-return separators, while the accepted raw string is passed to sh -c, allowing an attacker-influenced agent command to execute an additional arbitrary statement. With the default LocalEnvironment backend, the injected statement runs as a host subprocess with the privileges of the agent process and can affect confidentiality, integrity, and availability. This issue is fixed in ag2 version 1.1.1.

## Remediation

No remediation reported in collected sources

## Affected products and versions

- ag2ai / ag2: >= 0.13.2, < 1.1.1 (affected). Source: CNA: GitHub_M
- ag2ai / autogen: >= 0.13.2, <= 0.14.1 (affected). Source: CNA: GitHub_M

## Severity and prioritization

- CVSS 3.1: 8.8 (high); CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H; source: CNA: GitHub_M

- CISA KEV: No listing in collected sources

- EPSS: Not available

- SSVC: Not available

- Weaknesses: CWE-78, CWE-184

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://github.com/ag2ai/ag2/security/advisories/GHSA-2h4w-29cv-2cmv (CNA: GitHub_M; x_refsource_CONFIRM)

- https://github.com/ag2ai/ag2/commit/3cd86726bb731eb11d6270f0ef9e50e42b5abb39 (CNA: GitHub_M; x_refsource_MISC)

- https://github.com/ag2ai/ag2/releases/tag/v1.1.1 (CNA: GitHub_M; x_refsource_MISC)

## Provenance

- CNA: GitHub_M: https://www.cve.org/CVERecord?id=CVE-2026-113663; retrieved 2026-11-05; source updated 2026-11-05

Revision: 7b0f9c2c53d91b3f401a3d3ebbc439020590416c06cd9cfe47348451b8526f53

Canonical: https://y2.dev/cve/CVE-2026-113663

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