File upload/save delay with Imunify360 real-time scanning (enable_scan_inotify) enabled

Incident Report for Imunify360

Resolved

The issue is fixed in rustbolit 33.3.8 (already available from our rollout repos)
https://docs.imunify360.com/update/#update-guide
Posted May 11, 2026 - 09:17 UTC

Update

Fix for the issue is being prepared for beta release with rustbolit 33.3.6 version. Beta release expected on 5th of May (UTC).
Posted May 05, 2026 - 09:46 UTC

Update

We are continuing to work on a fix for this issue.
Posted Apr 30, 2026 - 12:17 UTC

Update

We are continuing to work on a fix for this issue.
Posted Apr 30, 2026 - 12:09 UTC

Update

We are continuing to work on a fix for this issue.
Posted Apr 30, 2026 - 10:29 UTC

Identified

File upload or file save operations may take around 10–15 seconds when Imunify360 scanning is enabled.

The issue can appear in one of the following scenarios:

Uploading files through a website when Automatically scan any file uploaded using web is enabled in Imunify360
Saving files through cPanel File Manager
Updating files or website content through a web interface
The following error can be found in the cPanel logs when the delay occurs during cPanel File Manager save operations:
-----
STDERR output from hook:
/usr/libexec/imunify360/cpanel_fileman_hook --save

cpanel_fileman_hook: Starting imunify fileman hook
cpanel_fileman_hook: save action
cpanel_fileman_hook: file /home/USER/tmp/TEMP_FILE is sent for scanning
Exception: timed out
cpanel_fileman_hook: internal error: timed out

File "/usr/libexec/imunify360/cpanel_fileman_hook", line 178, in aibolit_checker
aibolit_job.notify_aibolit_start_it_if_necessary(timeout=remaining_time())

File "/opt/imunify360/venv/lib64/python3.11/site-packages/im360/aibolit_job.py", line 110, in notify_aibolit_start_it_if_necessary
sock.send(b"1")

TimeoutError: timed out
------
Environment
Imunify360
WHM/cPanel
cPanel, DirectAdmin, or modsec

Automatically scan any file uploaded using web enabled in Imunify360 Settings
Solution
This is a known issue currently handled by the development team.
------------------------

Temporary Workaround

Disable Imunify360 real-time/inotify scanning:
--
imunify360-agent config update '{"MALWARE_SCANNING": {"enable_scan_inotify": false}}'
--
and/or:
--
imunify360-agent config update '{"MALWARE_SCANNING": {"enable_scan_modsec": false}}'
imunify360-agent config update '{"MALWARE_SCANNING": {"enable_scan_pure_ftpd": false}}'
--
After applying the workaround, reproduce the original action again:

Upload a file through the affected website form, or save a file through cPanel File Manager
Confirm whether the upload or save operation completes without the 10–15 second delay
Check whether the cpanel_fileman_hook --save timeout no longer appears in the cPanel logs

Cause
The delay is caused by a timeout in the Imunify360 scanning flow when the cPanel File Manager save hook or web upload scanning sends a temporary file for scanning. The logs show that the timeout occurs while communicating with the AI-Bolit scanning process.


The fixed package rustbolit 33.3.5 is preparing for release to the beta repo and should be available asap.
https://changelog.imunify.com/imunify360 (for checking)

Once the package becomes available, you can update it as follows:
--
yum update rustbolit --disablerepo=* --enablerepo=imunify360-testing
systemctl restart aibolit-resident.service
--
Posted Apr 30, 2026 - 10:28 UTC
This incident affected: Antivirus.