Vulnerability-Lookup

CVE-2026-73245 (GCVE-0-2026-73245)

Vulnerability from cvelistv5 – Published: 2026-08-11 21:36 – Updated: 2026-08-12 12:45

Title

Kestra: Unauthenticated management/actuator endpoints exposed on port 8081 (/env, /loggers) bypass API basic-auth

Summary

Kestra is an open-source, event-driven orchestration platform. Prior to 2.0.0-rc6, Kestra's cli/src/main/resources/application.yml serves Micronaut management endpoints on port 8081 without authentication even when Basic Auth protects /api/v1/** on port 8080, allowing unauthenticated GET /env requests to disclose resolved configuration and POST /loggers/{name} requests to change runtime log levels. This issue is fixed in 2.0.0-rc6.

Severity

6.5 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

SSVC

Exploitation: poc Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-12 12:45 UTC

CWE

CWE-306 - Missing Authentication for Critical Function

Assigner

GitHub_M mitre root

References

1 reference

URL	Tags
https://github.com/kestra-io/kestra/security/advi…	x_refsource_CONFIRM

Impacted products

1 product

Vendor	Product	Version	CPE status
kestra-io	kestra	Affected: < 2.0.0-rc6	guessed

Show details on NVD website

JSON

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FKIE_CVE-2026-73245

Vulnerability from fkie_nvd - Published: 2026-08-11 22:19 - Updated: 2026-09-09 20:50

Severity

6.5 (Medium) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

Summary

References

	URL	Tags
	security-advisories@github.com	https://github.com/kestra-io/kestra/security/advisories/GHSA-hpj9-grjp-7vc7
	134c704f-9b21-4f2e-91b3-4a467353bcc0	https://github.com/kestra-io/kestra/security/advisories/GHSA-hpj9-grjp-7vc7

Impacted products

	Vendor	Product	Version

JSON

To clipboard

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          "product": "kestra",
          "vendor": "kestra-io",
          "versions": [
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GHSA-HPJ9-GRJP-7VC7

Vulnerability from github – Published: 2026-09-17 17:17 – Updated: 2026-09-17 17:17

Summary

Kestra: Unauthenticated management/actuator endpoints exposed on port 8081 (/env, /loggers) bypass API basic-auth

Details

Summary

Kestra's Micronaut management endpoints are served on port 8081 with no authentication, even when the main API (port 8080) has basic-auth enabled. Anyone who can reach :8081 can read GET /env (full resolved environment/configuration) and mutate runtime state via POST /loggers/{name} (change log levels), among the other management endpoints. Enabling basic-auth creates a false sense of protection because the auth filter only covers /api/v1/** on 8080 and never applies to the 8081 management port. The shipped repository contains no statement that 8081 is management-only / must-not-be-exposed, and the vendor's reference docker-compose.yml publishes it with no warning.

Affected

Product: Kestra (kestra-io/kestra), an open-source orchestration/data-pipeline platform (Java / Micronaut).
Version: v1.3.29 (confirmed); the management-port exposure is an insecure default of the shipped configuration.
No fix at time of report.

Technical detail

Kestra runs the Micronaut management/actuator endpoints on a separate HTTP port 8081. The authentication filter (basic-auth, when configured) is scoped to the main API on port 8080 (/api/v1/**) and does not apply to 8081. As a result: - GET http://<host>:8081/env returns the full resolved environment/configuration (property sources), unauthenticated. - POST http://<host>:8081/loggers/{name} changes a logger's level at runtime, unauthenticated (a state-changing operation). - The other Micronaut management endpoints on 8081 are similarly reachable. The shipped application.yml comments, SECURITY.md, and the vendor's reference docker-compose.yml do not warn that 8081 must be kept internal, and the reference compose publishes 8081, so a deployment that enables basic-auth on the API still exposes the management port with no auth.

Impact

An unauthenticated network client that can reach port 8081 can read the full application configuration/environment (/env) and change runtime logging (/loggers), and reach the other management endpoints — an authentication-bypass on the management surface. (Sensitive credential values in /env are masked, so this is scored without a full-secret-read confidentiality impact.)

Proof of concept

Reproduced live on Kestra v1.3.29 with basic-auth enabled on the main API. Unauthenticated GET http://<host>:8081/env returned 200 with the resolved configuration/property sources, and POST http://<host>:8081/loggers/{name} returned 200 and changed the logger level — both with no credentials. The equivalent main-API request on 8080 returned 401 (control), confirming the auth filter covers only the API port and not the 8081 management port. (Credential values in /env were masked.)

Full request/response captures available on request.

Remediation

Apply authentication to the management port (bind the Micronaut management endpoints behind the same auth as the API, or require a separate management credential), and by default bind port 8081 to loopback only. At minimum, document prominently (SECURITY.md, application.yml, the reference docker-compose) that port 8081 must never be exposed to untrusted networks, and do not publish 8081 in the reference compose.

Credit

Reported by Santosh Kumar Puppala (GitHub: https://github.com/Santoshkumarpuppala).

Severity

6.5 (Medium)


                  
                    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

Show details on source website

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "Maven",
        "name": "io.kestra:kestra"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
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            }
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        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-73245"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-306"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-09-17T17:17:55Z",
    "nvd_published_at": "2026-08-11T22:19:05Z",
    "severity": "MODERATE"
  },
  "details": "## Summary\nKestra\u0027s Micronaut **management endpoints are served on port 8081 with no authentication**, even when the main API (port 8080) has basic-auth enabled. Anyone who can reach `:8081` can read `GET /env` (full resolved environment/configuration) and mutate runtime state via `POST /loggers/{name}` (change log levels), among the other management endpoints. Enabling basic-auth creates a false sense of protection because the auth filter only covers `/api/v1/**` on 8080 and never applies to the 8081 management port. The shipped repository contains no statement that 8081 is management-only / must-not-be-exposed, and the vendor\u0027s reference `docker-compose.yml` publishes it with no warning.\n \n## Affected\n- Product: Kestra (`kestra-io/kestra`), an open-source orchestration/data-pipeline platform (Java / Micronaut).\n- Version: **v1.3.29** (confirmed); the management-port exposure is an insecure default of the shipped configuration.\n- No fix at time of report.\n## Technical detail\nKestra runs the Micronaut management/actuator endpoints on a separate HTTP port **8081**. The authentication filter (basic-auth, when configured) is scoped to the main API on port 8080 (`/api/v1/**`) and does not apply to 8081. As a result:\n- `GET http://\u003chost\u003e:8081/env` returns the full resolved environment/configuration (property sources), unauthenticated.\n- `POST http://\u003chost\u003e:8081/loggers/{name}` changes a logger\u0027s level at runtime, unauthenticated (a state-changing operation).\n- The other Micronaut management endpoints on 8081 are similarly reachable.\nThe shipped `application.yml` comments, `SECURITY.md`, and the vendor\u0027s reference `docker-compose.yml` do not warn that 8081 must be kept internal, and the reference compose publishes 8081, so a deployment that enables basic-auth on the API still exposes the management port with no auth.\n \n## Impact\nAn unauthenticated network client that can reach port 8081 can read the full application configuration/environment (`/env`) and change runtime logging (`/loggers`), and reach the other management endpoints \u2014 an authentication-bypass on the management surface. (Sensitive credential values in `/env` are masked, so this is scored without a full-secret-read confidentiality impact.)\n \n## Proof of concept\nReproduced live on Kestra v1.3.29 with basic-auth enabled on the main API. Unauthenticated `GET http://\u003chost\u003e:8081/env` returned `200` with the resolved configuration/property sources, and `POST http://\u003chost\u003e:8081/loggers/{name}` returned `200` and changed the logger level \u2014 both with no credentials. The equivalent main-API request on 8080 returned `401` (control), confirming the auth filter covers only the API port and not the 8081 management port. (Credential values in `/env` were masked.)\n \nFull request/response captures available on request.\n \n## Remediation\nApply authentication to the management port (bind the Micronaut management endpoints behind the same auth as the API, or require a separate management credential), and by default bind port 8081 to loopback only. At minimum, document prominently (SECURITY.md, application.yml, the reference docker-compose) that port 8081 must never be exposed to untrusted networks, and do not publish 8081 in the reference compose.\n \n## Credit\nReported by **Santosh Kumar Puppala** (GitHub: https://github.com/Santoshkumarpuppala).",
  "id": "GHSA-hpj9-grjp-7vc7",
  "modified": "2026-09-17T17:17:55Z",
  "published": "2026-09-17T17:17:55Z",
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    {
      "type": "WEB",
      "url": "https://github.com/kestra-io/kestra/security/advisories/GHSA-hpj9-grjp-7vc7"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-73245"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/kestra-io/kestra"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Kestra: Unauthenticated management/actuator endpoints exposed on port 8081 (/env, /loggers) bypass API basic-auth"
}

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.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

CVE-2026-73245 (GCVE-0-2026-73245)

FKIE_CVE-2026-73245

GHSA-HPJ9-GRJP-7VC7

Summary

Affected

Technical detail

Impact

Proof of concept

Remediation

Credit

Tags

Sightings

Nomenclature

Related by attack behaviour