Missing authentication in Archon control API allows host command execution
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-306.
Summary
Archon from 0.2.13 through 0.11.1 by coleam00 does not require authentication for its /api/* control API, which binds to 0.0.0.0 by default. A remote attacker with network access can send messages to the AI coding agent, which runs with bypassPermissions, and execute commands on the host as the Archon user. The flaw is classified as CWE-306, missing authentication for a critical function, and requires no privileges or user interaction.
Written with Claude Haiku 5.5 from the sources below · 2026-10-28
Description from the CNA
Archon 0.2.13 through 0.11.1 contains a missing authentication vulnerability that allows unauthenticated attackers to access the /api/* control API, which binds to 0.0.0.0 by default. Attackers with network access can send messages to the AI coding agent, which runs with bypassPermissions, to execute commands on the host as the Archon user.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- Yes
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
Remediation
The sources list no fixed version for Archon. Restrict network access to the Archon control API until a fix is available.
Written with Claude Haiku 5.5 from the sources below · 2026-10-28
Timeline
- 2026-10-16 Threatist record created from CVE-2026-111322
- 2026-10-18 CISA SSVC decision points changed
- 2026-10-18 Priority changed: MEDIUM → HIGH
References
Other 4
Sources
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