Vulnerability-Lookup

Vulnerability from bitnami_vulndb

Published

2026-04-13 05:38

Modified

2026-04-13 06:11

Summary

Apache Airflow: Authorization bypass in DagRun wait endpoint (XCom exposure)

Details

Airflow uses the FAB Auth Manager to manage access control on a per-resource basis. The Viewer role is intended to be read-only by default, and the security model documentation defines Viewer users as those who can inspect DAGs without accessing sensitive execution results.

Users are recommended to upgrade to Apache Airflow 3.2.0 which resolves this issue.

JSON

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{
  "affected": [
    {
      "package": {
        "ecosystem": "Bitnami",
        "name": "airflow",
        "purl": "pkg:bitnami/airflow"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "3.0.0"
            },
            {
              "fixed": "3.2.0"
            }
          ],
          "type": "SEMVER"
        }
      ],
      "severity": [
        {
          "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N",
          "type": "CVSS_V3"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-34538"
  ],
  "database_specific": {
    "cpes": [
      "cpe:2.3:a:apache:airflow:*:*:*:*:*:python:*:*"
    ],
    "severity": "Medium"
  },
  "details": "Apache Airflow versions 3.0.0 through 3.1.8 DagRun wait endpoint returns XCom result values even to users who only have DAG Run read permissions, such as the Viewer role.This behavior conflicts with the FAB RBAC model, which treats XCom as a separate protected resource, and with the security model documentation that defines the Viewer role as read-only.\n\nAirflow uses the FAB Auth Manager to manage access control on a per-resource basis. The Viewer role is intended to be read-only by default, and the security model documentation defines Viewer users as those who can inspect DAGs without accessing sensitive execution results.\n\nUsers are recommended to upgrade to Apache Airflow 3.2.0 which resolves this issue.",
  "id": "BIT-airflow-2026-34538",
  "modified": "2026-04-13T06:11:47.324Z",
  "published": "2026-04-13T05:38:18.100Z",
  "references": [
    {
      "type": "WEB",
      "url": "http://www.openwall.com/lists/oss-security/2026/04/09/9"
    },
    {
      "type": "WEB",
      "url": "https://github.com/apache/airflow/pull/64415"
    },
    {
      "type": "WEB",
      "url": "https://lists.apache.org/thread/9mq3msqhmgjwdzbr6bgthj4brb3oz9fl"
    },
    {
      "type": "WEB",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-34538"
    }
  ],
  "schema_version": "1.6.2",
  "summary": "Apache Airflow: Authorization bypass in DagRun wait endpoint (XCom exposure)"
}

CVE-2026-34538 (GCVE-0-2026-34538)

Vulnerability from cvelistv5 – Published: 2026-04-09 09:09 – Updated: 2026-04-09 14:06

Title

Apache Airflow: Authorization bypass in DagRun wait endpoint (XCom exposure)

Summary

Apache Airflow versions 3.0.0 through 3.1.8 DagRun wait endpoint returns XCom result values even to users who only have DAG Run read permissions, such as the Viewer role.This behavior conflicts with the FAB RBAC model, which treats XCom as a separate protected resource, and with the security model documentation that defines the Viewer role as read-only. Airflow uses the FAB Auth Manager to manage access control on a per-resource basis. The Viewer role is intended to be read-only by default, and the security model documentation defines Viewer users as those who can inspect DAGs without accessing sensitive execution results. Users are recommended to upgrade to Apache Airflow 3.2.0 which resolves this issue.

Severity ?

No CVSS data available.

CWE

CWE-668 - Exposure of Resource to Wrong Sphere

Assigner

apache

References

URL

Tags

	https://github.com/apache/airflow/pull/64415	patch
	https://lists.apache.org/thread/9mq3msqhmgjwdzbr6…	vendor-advisory

Impacted products

	Vendor	Product	Version
	Apache Software Foundation	Apache Airflow	Affected: 3.0.0 , < 3.2.0 (semver)

Credits

selen Kevin Yang

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2026-04-09T11:21:33.223Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "url": "http://www.openwall.com/lists/oss-security/2026/04/09/9"
          }
        ],
        "title": "CVE Program Container"
      },
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "NETWORK",
              "availabilityImpact": "NONE",
              "baseScore": 6.5,
              "baseSeverity": "MEDIUM",
              "confidentialityImpact": "HIGH",
              "integrityImpact": "NONE",
              "privilegesRequired": "LOW",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N",
              "version": "3.1"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2026-34538",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
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                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-04-09T14:05:44.357143Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-04-09T14:06:21.963Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "collectionURL": "https://pypi.python.org",
          "defaultStatus": "unaffected",
          "packageName": "apache-airflow",
          "product": "Apache Airflow",
          "vendor": "Apache Software Foundation",
          "versions": [
            {
              "lessThan": "3.2.0",
              "status": "affected",
              "version": "3.0.0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "credits": [
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          "lang": "en",
          "type": "finder",
          "value": "selen"
        },
        {
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          "type": "remediation developer",
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        }
      ],
      "descriptions": [
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          "supportingMedia": [
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              "type": "text/html",
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            }
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      ],
      "metrics": [
        {
          "other": {
            "content": {
              "text": "low"
            },
            "type": "Textual description of severity"
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      "problemTypes": [
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      "providerMetadata": {
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      "references": [
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          "url": "https://github.com/apache/airflow/pull/64415"
        },
        {
          "tags": [
            "vendor-advisory"
          ],
          "url": "https://lists.apache.org/thread/9mq3msqhmgjwdzbr6bgthj4brb3oz9fl"
        }
      ],
      "source": {
        "discovery": "UNKNOWN"
      },
      "title": "Apache Airflow: Authorization bypass in DagRun wait endpoint (XCom exposure)",
      "x_generator": {
        "engine": "Vulnogram 0.2.0"
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  "cveMetadata": {
    "assignerOrgId": "f0158376-9dc2-43b6-827c-5f631a4d8d09",
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    "datePublished": "2026-04-09T09:09:20.906Z",
    "dateReserved": "2026-03-30T16:07:03.425Z",
    "dateUpdated": "2026-04-09T14:06:21.963Z",
    "state": "PUBLISHED"
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}

Sightings

Author	Source	Type	Date

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.

Action not permitted

Vulnerability from bitnami_vulndb

CVE-2026-34538 (GCVE-0-2026-34538)

Tags

Sightings

Nomenclature