Bug 2567979 (CVE-2026-113663)

Summary: CVE-2026-113663 ag2: autogen: AG2: Arbitrary command execution via newline character injection in shell filter
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerability-draftAssignee: Product Security DevOps Team <prodsec-dev>
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Priority: high    
Version: unspecifiedKeywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in AG2. The sandbox shell filtering mechanism fails to properly sanitize newline and carriage-return line break characters in command inputs. An attacker capable of influencing agent commands can exploit this flaw to inject and execute arbitrary commands on the host system with the privileges of the agent process.
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Description OSIDB Bzimport 2026-11-05 23:01:23 UTC 
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.