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CVE-2026-85513 (GCVE-0-2026-85513)

Vulnerability from cvelistv5 – Published: 2026-09-04 12:30 – Updated: 2026-09-04 12:30
VLAI
Title
StackStorm st2 NoOp RBAC backend actionexecutions.py privileges management
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.
CWE
  • CWE-269 - Improper Privilege Management
  • CWE-266 - Incorrect Privilege Assignment
References
URL Tags
https://vuldb.com/vuln/398678 vdb-entrytechnical-description
https://vuldb.com/vuln/398678/cti signaturepermissions-required
https://vuldb.com/cve/CVE-2026-85513 third-party-advisory
https://vuldb.com/submit/894916 third-party-advisory
https://github.com/StackStorm/st2/issues/6379 exploitissue-tracking
https://github.com/StackStorm/st2/ product
Impacted products
Vendor Product Version CPE status
StackStorm st2 Affected: 3.0
Affected: 3.1
Affected: 3.2
Affected: 3.3
Affected: 3.4
Affected: 3.5
Affected: 3.6
Affected: 3.7
Affected: 3.8
Affected: 3.9.0
    cpe:2.3:a:stackstorm:st2:*:*:*:*:*:*:*:*
Create a notification for this product.
Show details on NVD website

{
  "containers": {
    "cna": {
      "affected": [
        {
          "cpes": [
            "cpe:2.3:a:stackstorm:st2:*:*:*:*:*:*:*:*"
          ],
          "modules": [
            "NoOp RBAC backend"
          ],
          "product": "st2",
          "vendor": "StackStorm",
          "versions": [
            {
              "status": "affected",
              "version": "3.0"
            },
            {
              "status": "affected",
              "version": "3.1"
            },
            {
              "status": "affected",
              "version": "3.2"
            },
            {
              "status": "affected",
              "version": "3.3"
            },
            {
              "status": "affected",
              "version": "3.4"
            },
            {
              "status": "affected",
              "version": "3.5"
            },
            {
              "status": "affected",
              "version": "3.6"
            },
            {
              "status": "affected",
              "version": "3.7"
            },
            {
              "status": "affected",
              "version": "3.8"
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              "version": "3.9.0"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "reporter",
          "value": "geochen (VulDB User)"
        },
        {
          "lang": "en",
          "type": "coordinator",
          "value": "VulDB CNA Team"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "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."
        }
      ],
      "metrics": [
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            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P",
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            "version": "3.0"
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            "version": "2.0"
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      "problemTypes": [
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          "descriptions": [
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        {
          "descriptions": [
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              "description": "Incorrect Privilege Assignment",
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        "dateUpdated": "2026-09-04T12:30:10.474Z",
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        "shortName": "VulDB"
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      "references": [
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          "name": "VDB-398678 | StackStorm st2 NoOp RBAC backend actionexecutions.py privileges management",
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          "url": "https://vuldb.com/vuln/398678"
        },
        {
          "name": "VDB-398678 | CTI Indicators (IOB, IOC, TTP, IOA)",
          "tags": [
            "signature",
            "permissions-required"
          ],
          "url": "https://vuldb.com/vuln/398678/cti"
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          "name": "CVE-2026-85513 | CVE Analysis and Report",
          "tags": [
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          "url": "https://github.com/StackStorm/st2/issues/6379"
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          "value": "Advisory disclosed"
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          "time": "2026-09-04T02:00:00.000Z",
          "value": "VulDB entry created"
        },
        {
          "lang": "en",
          "time": "2026-09-04T07:40:53.000Z",
          "value": "VulDB entry last update"
        }
      ],
      "title": "StackStorm st2 NoOp RBAC backend actionexecutions.py privileges management",
      "x_generator": [
        "VulDB PVTS v202609"
      ]
    }
  },
  "cveMetadata": {
    "assignerOrgId": "1af790b2-7ee1-4545-860a-a788eba489b5",
    "assignerShortName": "VulDB",
    "cveId": "CVE-2026-85513",
    "datePublished": "2026-09-04T12:30:10.474Z",
    "dateReserved": "2026-09-04T05:35:42.404Z",
    "dateUpdated": "2026-09-04T12:30:10.474Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-85513",
      "date": "2026-09-05",
      "epss": "0.00248",
      "percentile": "0.16072"
    },
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  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

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