Description
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.
References7
- github.com/coleam00/Archon
- github.com/coleam00/Archon/blob/v0.11.1/packages/server/src/aut…
- github.com/coleam00/Archon/blob/v0.11.1/packages/server/src/ind…
- github.com/coleam00/Archon/blob/v0.11.1/packages/server/src/rou…
- hackmd.io/@hieuPenguinnn/archon-os-api-missing-authentication-d…
- www.vulncheck.com/advisories/archon-0.2.13-through-0.11.1-missi…
- hackmd.io/@hieuPenguinnn/archon-os-api-missing-authentication-d…
Metrics
- CVSS 3.1
-
9.8
CRITICAL
Score source: CNA
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - CVSS 4.0
-
9.3
CRITICAL
Score source: CNA
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - EPSS — exploit probability
- 1% percentile: 60 · as of 10 November 2026
- CWE
- CWE-306
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.