TI-2026-58674 Aliases CVE-2026-85513 GHSA-w6wr-mr8c-m255

StackStorm st2 NoOp RBAC backend actionexecutions.py privileges management

MEDIUM 57CWE-266Published 2026-09-04 · Updated 2026-09-08

Key facts

Attack vector: Network
Privileges required: Low
User interaction: None
Attack complexity: Low
Attack requirements: None
Impact type: Privilege escalation
Confidentiality · integrity · availability: Low · Low · Low
Fix status: No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-266.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV

EPSS 0.00425 37th percentileScored 2026-11-07

Public exploit Yes 1 exploit referenceTagged by the CNA

Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: Poc
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
StackStorm	st2	3.0; 3.1; 3.2; 3.3; 3.4; 3.5; 3.6; 3.7; 3.8; 3.9.0	—	No fix listed	CNA

st2 VendorStackStorm Affected 3.0; 3.1; 3.2; 3.3; 3.4; 3.5; 3.6; 3.7; 3.8; 3.9.0 Fixed in — No fix listed CNA

CPE names CNA · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:stackstorm:st2::::::::	—	—	StackStorm

cpe:2.3:a:stackstorm:st2:*:*:*:*:*:*:*:* Versions — — ·StackStorm

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2026-85513
2026-10-03 Alias added: GHSA-w6wr-mr8c-m255

References

Exploit 1

https://github.com/StackStorm/st2/issues/6379

Other 1

https://github.com/StackStorm/st2/

TI-2026-58675 StackStorm st2 API Key auth.py privileges management CVSS 4.0MEDIUM 5.3
TI-2021-20192 In StackStorm versions prior to 3.6.0, the jinja interpreter was not run in sandbox mode… CVSS 3.1HIGH 8.8
TI-2022-21635 Improper access control in Key-Value RBAC in StackStorm version 3.7.0 didn't check the… CVSS 3.1HIGH 7.5
TI-2021-09734 StackStorm before 3.4.1, in some situations, has an infinite loop that consumes all… CVSS 3.1HIGH 7.5
TI-2019-06999 In st2web in StackStorm Web UI before 2.9.3 and 2.10.x before 2.10.3, it is possible to… CVSS 3.0MEDIUM 6.1
TI-2022-21463 Cross-site scripting (XSS) vulnerability in the Web UI of StackStorm versions prior to… CVSS 3.1MEDIUM 5.4

See all 7 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences