Massive resource/memory leak in worker in 2026.8.0

[patschi]

Describe the bug

I have upgraded to 2026.8.0 about 3 days ago, and just today noticed a massive memory leak in the worker, rendering authentik to be barely usable due to memory constraints.

Dedicated VM to Authentik:

Docker stats clearly pointed towards the worker:

# docker stats
CONTAINER ID   NAME                        CPU %     MEM USAGE / LIMIT     MEM %     NET I/O           BLOCK I/O         PIDS
...
7c605995bbce   ak-outpost-op-rac01         0.16%     10.38MiB / 3.824GiB   0.26%     7.94MB / 13.5MB   53.2GB / 2.24GB   10
fa5f5dc1c6a8   ak-outpost-op-proxy01       0.00%     5.746MiB / 3.824GiB   0.15%     397kB / 274kB     6.55GB / 77.2MB   6
17bf7a618d76   authentik-worker-1          0.12%     3.098GiB / 3.824GiB   81.02%    2.6GB / 929MB     256GB / 105GB     19
f0fed836692f   authentik-server-1          15.47%    95.86MiB / 3.824GiB   2.45%     2.17GB / 2.38GB   120GB / 12.6GB    28

Unfotrunately the logs were rather quiet, so I don't know what could be causing this. Nor am I sure how to check what exactly was consuming up as much memory.

Happy to continue observing and perform specific troubleshooting steps once it re-occurred. Raised this now for reasons of awareness and help with further troubleshooting.

Possibly related to #25416 or #25469 due to repeatedly failing sync?

How to reproduce

Unclear yet. Still observing.

Expected behavior

No memory leak.

Screenshots

No response

Additional context

No response

Deployment Method

Docker

Version

2026.8.0

Relevant log output

[rissson]

As far as I know, we haven't changed the way the worker runs in 2026.8, so this is probably due to some running tasks