CVE-2026-85513 StackStorm st2 NoOp RBAC backend actionexecutions.py privileges management
Remote attackers can escalate privileges in StackStorm st2 via improper privilege management in the NoOp RBAC backend, affecting default installations.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-85513?
CVE-2026-85513 is a medium-severity vulnerability in StackStorm st2, published on 4 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
A weakness has been identified in StackStorm st2 up to 3.9.0. This issue affects the function assert_user_is_admin_if_user_query_param_is_provided of the file st2api/st2api/controllers/v1/actionexecutions.py of the component NoOp RBAC backend. This manipulation of the argument User causes improper privilege management. The attack is possible to be carried out remotely. The exploit has been made available to the public and could be used for attacks. Prior advisory CVE-2022-44009 was reported as a follow-up on the same sink, but this issue is distinct: it needs no Jinja RBAC und affects default install with RBAC disabled. The project was informed of the problem early through an issue report but has not responded yet.
Which versions are affected by CVE-2026-85513?
How do I fix CVE-2026-85513?
No fix has been published for CVE-2026-85513 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-85513 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-85513 exists.
Sources
Also known as GHSA-w6wr-mr8c-m255.