Vulnerability-Lookup

CVE-2026-42359 (GCVE-0-2026-42359)

Vulnerability from cvelistv5 – Published: 2026-06-01 07:49 – Updated: 2026-06-02 13:03

Title

Apache Airflow: Authenticated RCE via XCom PATCH endpoint — XComUpdateBody missing FORBIDDEN_XCOM_KEYS validator

Summary

A bug in Apache Airflow's XCom PATCH endpoint `PATCH /api/v2/xcomEntries/{key}` allowed an authenticated UI/API user with XCom write permission on a Dag to set XCom entries under reserved key names (e.g. `return_value`) that the matching POST endpoint already validated against `FORBIDDEN_XCOM_KEYS`. The endpoint also accepted serialized payload shapes the triggerer's deserializer treats as code; combined, this allowed RCE on the triggerer when the affected task next deferred. Affects deployments where untrusted users have XCom write permission on Dags that defer to the triggerer. This is a fix-bypass of CVE-2026-33858: PR #64148 added the `FORBIDDEN_XCOM_KEYS` validator only on the POST/set path; the PATCH path was not covered. Users who already upgraded for CVE-2026-33858 should additionally upgrade to `apache-airflow` 3.2.2 or later to cover the PATCH-path bypass.

Severity

8.8 (High)


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

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-06-02 03:55 UTC

CWE

CWE-502 - Deserialization of Untrusted Data

Assigner

apache mitre root

References

3 references

URL	Tags
https://github.com/apache/airflow/pull/65915	patch
https://lists.apache.org/thread/g8dqykpf1p90tysq8…	vendor-advisory
https://www.cve.org/CVERecord?id=CVE-2026-33858	related

Impacted products

1 product

Vendor	Product	Version	CPE status
Apache Software Foundation	Apache Airflow	Affected: 3.2.0 , < 3.2.2 (semver)	guessed

Credits

Jeff Vier (@boinger) Anisto Mejin (Izat) Venkatraman Kumar (r3dw0lfsec), Securin Jarek Potiuk

Show details on NVD website

JSON

To clipboard

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bit-airflow-2026-42359

Vulnerability from bitnami_vulndb

Published

2026-06-05 05:40

Modified

2026-09-08 08:34

Summary

Apache Airflow: Authenticated RCE via XCom PATCH endpoint — XComUpdateBody missing FORBIDDEN_XCOM_KEYS validator

Details

A bug in Apache Airflow's XCom PATCH endpoint PATCH /api/v2/xcomEntries/{key} allowed an authenticated UI/API user with XCom write permission on a Dag to set XCom entries under reserved key names (e.g. return_value) that the matching POST endpoint already validated against FORBIDDEN_XCOM_KEYS. The endpoint also accepted serialized payload shapes the triggerer's deserializer treats as code; combined, this allowed RCE on the triggerer when the affected task next deferred. Affects deployments where untrusted users have XCom write permission on Dags that defer to the triggerer. This is a fix-bypass of CVE-2026-33858: PR #64148 added the FORBIDDEN_XCOM_KEYS validator only on the POST/set path; the PATCH path was not covered. Users who already upgraded for CVE-2026-33858 should additionally upgrade to apache-airflow 3.2.2 or later to cover the PATCH-path bypass.

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "Bitnami",
        "name": "airflow",
        "purl": "pkg:bitnami/airflow"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "3.2.0"
            },
            {
              "fixed": "3.2.2"
            }
          ],
          "type": "SEMVER"
        }
      ],
      "severity": [
        {
          "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "type": "CVSS_V3"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-42359"
  ],
  "database_specific": {
    "cpes": [
      "cpe:2.3:a:apache:airflow:*:*:*:*:*:python:*:*"
    ],
    "severity": "High"
  },
  "details": "A bug in Apache Airflow\u0027s XCom PATCH endpoint `PATCH /api/v2/xcomEntries/{key}` allowed an authenticated UI/API user with XCom write permission on a Dag to set XCom entries under reserved key names (e.g. `return_value`) that the matching POST endpoint already validated against `FORBIDDEN_XCOM_KEYS`. The endpoint also accepted serialized payload shapes the triggerer\u0027s deserializer treats as code; combined, this allowed RCE on the triggerer when the affected task next deferred. Affects deployments where untrusted users have XCom write permission on Dags that defer to the triggerer. This is a fix-bypass of CVE-2026-33858: PR #64148 added the `FORBIDDEN_XCOM_KEYS` validator only on the POST/set path; the PATCH path was not covered. Users who already upgraded for CVE-2026-33858 should additionally upgrade to `apache-airflow` 3.2.2 or later to cover the PATCH-path bypass.",
  "id": "BIT-airflow-2026-42359",
  "modified": "2026-09-08T08:34:36.952Z",
  "published": "2026-06-05T05:40:40.845Z",
  "references": [
    {
      "type": "FIX",
      "url": "https://github.com/apache/airflow/pull/65915"
    },
    {
      "type": "ADVISORY",
      "url": "https://lists.apache.org/thread/g8dqykpf1p90tysq8tln4qtkqwb1038s"
    },
    {
      "type": "WEB",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-42359"
    },
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-33858"
    }
  ],
  "schema_version": "1.6.2",
  "summary": "Apache Airflow: Authenticated RCE via XCom PATCH endpoint \u2014 XComUpdateBody missing FORBIDDEN_XCOM_KEYS validator"
}

cleanstart-2026-iw40229

Vulnerability from cleanstart

Published

2026-07-30 07:10

Modified

2026-09-04 12:17

Summary

Security fixes in airflow-3 3.1.8-r5

Details

Package airflow-3 version 3.1.8-r5 fixes 19 vulnerabilities: CVE-2026-42526, CVE-2026-27173, CVE-2026-41018, CVE-2026-46745, CVE-2026-50203...

References

URL

Type

https://github.com/apache/airflow

WEB

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "CleanStart",
        "name": "airflow-3"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "3.1.8-r5"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "3.1.8-r5"
      ]
    }
  ],
  "credits": [],
  "database_specific": {},
  "details": "Package airflow-3 version 3.1.8-r5 fixes 19 vulnerabilities: CVE-2026-42526, CVE-2026-27173, CVE-2026-41018, CVE-2026-46745, CVE-2026-50203...",
  "id": "CLEANSTART-2026-IW40229",
  "modified": "2026-09-04T12:17:57Z",
  "published": "2026-07-30T07:10:53Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/apache/airflow"
    }
  ],
  "related": [],
  "schema_version": "1.7.3",
  "summary": "Security fixes in airflow-3 3.1.8-r5",
  "upstream": [
    "CVE-2026-42526",
    "CVE-2026-27173",
    "CVE-2026-41018",
    "CVE-2026-46745",
    "CVE-2026-50203",
    "CVE-2026-41016",
    "CVE-2026-57585",
    "CVE-2026-44405",
    "CVE-2026-49486",
    "CVE-2026-12771",
    "CVE-2026-28779",
    "CVE-2026-12799",
    "CVE-2026-41084",
    "CVE-2026-42359",
    "CVE-2026-41014",
    "CVE-2026-7246",
    "CVE-2026-12797",
    "CVE-2026-12774",
    "ghsa-6v7p-g79w-8964"
  ]
}

FKIE_CVE-2026-42359

Vulnerability from fkie_nvd - Published: 2026-06-01 09:16 - Updated: 2026-07-21 19:10

Severity

8.8 (High) - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Summary

References

URL	Tags
security@apache.org	https://github.com/apache/airflow/pull/65915	Issue Tracking, Patch
security@apache.org	https://lists.apache.org/thread/g8dqykpf1p90tysq8tln4qtkqwb1038s	Mailing List, Vendor Advisory
security@apache.org	https://www.cve.org/CVERecord?id=CVE-2026-33858	Third Party Advisory

Impacted products

	Vendor	Product	Version
	apache	airflow	*

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "collectionURL": "https://pypi.python.org",
          "defaultStatus": "unaffected",
          "packageName": "apache-airflow",
          "product": "Apache Airflow",
          "vendor": "Apache Software Foundation",
          "versions": [
            {
              "lessThan": "3.2.2",
              "status": "affected",
              "version": "3.2.0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "source": "security@apache.org"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:apache:airflow:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "D170BE0B-8FB0-455D-B886-AEA5677D12A8",
              "versionEndExcluding": "3.2.2",
              "versionStartIncluding": "3.2.0",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "A bug in Apache Airflow\u0027s XCom PATCH endpoint `PATCH /api/v2/xcomEntries/{key}` allowed an authenticated UI/API user with XCom write permission on a Dag to set XCom entries under reserved key names (e.g. `return_value`) that the matching POST endpoint already validated against `FORBIDDEN_XCOM_KEYS`. The endpoint also accepted serialized payload shapes the triggerer\u0027s deserializer treats as code; combined, this allowed RCE on the triggerer when the affected task next deferred. Affects deployments where untrusted users have XCom write permission on Dags that defer to the triggerer. This is a fix-bypass of CVE-2026-33858: PR #64148 added the `FORBIDDEN_XCOM_KEYS` validator only on the POST/set path; the PATCH path was not covered. Users who already upgraded for CVE-2026-33858 should additionally upgrade to `apache-airflow` 3.2.2 or later to cover the PATCH-path bypass."
    },
    {
      "lang": "es",
      "value": "Un error en el endpoint PATCH de XCom de Apache Airflow \u0027PATCH /api/v2/xcomEntries/{key}\u0027 permiti\u00f3 a un usuario autenticado de UI/API con permiso de escritura de XCom en un Dag establecer entradas de XCom bajo nombres de clave reservados (por ejemplo, \u0027return_value\u0027) que el endpoint POST correspondiente ya validaba contra \u0027FORBIDDEN_XCOM_KEYS\u0027. El endpoint tambi\u00e9n aceptaba formas de carga \u00fatil serializadas que el deserializador del disparador trata como c\u00f3digo; combinado, esto permiti\u00f3 RCE en el disparador cuando la tarea afectada se aplaz\u00f3 a continuaci\u00f3n. Afecta a implementaciones donde usuarios no confiables tienen permiso de escritura de XCom en Dags que se aplazan al disparador. Esto es un bypass de la correcci\u00f3n de CVE-2026-33858: PR #64148 a\u00f1adi\u00f3 el validador \u0027FORBIDDEN_XCOM_KEYS\u0027 solo en la ruta POST/set; la ruta PATCH no estaba cubierta. Los usuarios que ya actualizaron para CVE-2026-33858 deber\u00edan actualizar adicionalmente a \u0027apache-airflow\u0027 3.2.2 o posterior para cubrir el bypass de la ruta PATCH."
    }
  ],
  "id": "CVE-2026-42359",
  "lastModified": "2026-07-21T19:10:00.107",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 8.8,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 5.9,
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-42359",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-06-02T03:55:43.691388Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-06-01T09:16:18.907",
  "references": [
    {
      "source": "security@apache.org",
      "tags": [
        "Issue Tracking",
        "Patch"
      ],
      "url": "https://github.com/apache/airflow/pull/65915"
    },
    {
      "source": "security@apache.org",
      "tags": [
        "Mailing List",
        "Vendor Advisory"
      ],
      "url": "https://lists.apache.org/thread/g8dqykpf1p90tysq8tln4qtkqwb1038s"
    },
    {
      "source": "security@apache.org",
      "tags": [
        "Third Party Advisory"
      ],
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-33858"
    }
  ],
  "sourceIdentifier": "security@apache.org",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-502"
        }
      ],
      "source": "security@apache.org",
      "type": "Secondary"
    }
  ]
}

GHSA-WR76-29CR-67W8

Vulnerability from github – Published: 2026-06-01 09:31 – Updated: 2026-07-09 21:03

Summary

Apache Airflow has a Deserialization of Untrusted Data vulnerability

Details

Severity

8.8 (High)


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

Show details on source website

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "PyPI",
        "name": "apache-airflow"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "3.2.0"
            },
            {
              "fixed": "3.2.2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-42359"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-502"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-07-09T21:03:20Z",
    "nvd_published_at": "2026-06-01T09:16:18Z",
    "severity": "HIGH"
  },
  "details": "A bug in Apache Airflow\u0027s XCom PATCH endpoint `PATCH /api/v2/xcomEntries/{key}` allowed an authenticated UI/API user with XCom write permission on a Dag to set XCom entries under reserved key names (e.g. `return_value`) that the matching POST endpoint already validated against `FORBIDDEN_XCOM_KEYS`. The endpoint also accepted serialized payload shapes the triggerer\u0027s deserializer treats as code; combined, this allowed RCE on the triggerer when the affected task next deferred. Affects deployments where untrusted users have XCom write permission on Dags that defer to the triggerer. This is a fix-bypass of CVE-2026-33858: PR #64148 added the `FORBIDDEN_XCOM_KEYS` validator only on the POST/set path; the PATCH path was not covered. Users who already upgraded for CVE-2026-33858 should additionally upgrade to `apache-airflow` 3.2.2 or later to cover the PATCH-path bypass.",
  "id": "GHSA-wr76-29cr-67w8",
  "modified": "2026-07-09T21:03:20Z",
  "published": "2026-06-01T09:31:14Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-42359"
    },
    {
      "type": "WEB",
      "url": "https://github.com/apache/airflow/pull/65915"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/apache/airflow"
    },
    {
      "type": "WEB",
      "url": "https://github.com/pypa/advisory-database/tree/main/vulns/apache-airflow/PYSEC-2026-185.yaml"
    },
    {
      "type": "WEB",
      "url": "https://lists.apache.org/thread/g8dqykpf1p90tysq8tln4qtkqwb1038s"
    },
    {
      "type": "WEB",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-33858"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Apache Airflow has a Deserialization of Untrusted Data vulnerability"
}

PYSEC-2026-185

Vulnerability from pysec - Published: 2026-06-01 09:16 - Updated: 2026-06-03 10:54

Details

Severity

8.8 (High)


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

Impacted products

Name	purl
apache-airflow	pkg:pypi/apache-airflow

Aliases

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {},
      "package": {
        "ecosystem": "PyPI",
        "name": "apache-airflow",
        "purl": "pkg:pypi/apache-airflow"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "3.2.0"
            },
            {
              "fixed": "3.2.2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "3.2.0",
        "3.2.1",
        "3.2.1rc1",
        "3.2.1rc2",
        "3.2.1rc3",
        "3.2.2rc1",
        "3.2.2rc2",
        "3.2.2rc3"
      ]
    }
  ],
  "aliases": [
    "CVE-2026-42359",
    "GHSA-wr76-29cr-67w8"
  ],
  "details": "A bug in Apache Airflow\u0027s XCom PATCH endpoint `PATCH /api/v2/xcomEntries/{key}` allowed an authenticated UI/API user with XCom write permission on a Dag to set XCom entries under reserved key names (e.g. `return_value`) that the matching POST endpoint already validated against `FORBIDDEN_XCOM_KEYS`. The endpoint also accepted serialized payload shapes the triggerer\u0027s deserializer treats as code; combined, this allowed RCE on the triggerer when the affected task next deferred. Affects deployments where untrusted users have XCom write permission on Dags that defer to the triggerer. This is a fix-bypass of CVE-2026-33858: PR #64148 added the `FORBIDDEN_XCOM_KEYS` validator only on the POST/set path; the PATCH path was not covered. Users who already upgraded for CVE-2026-33858 should additionally upgrade to `apache-airflow` 3.2.2 or later to cover the PATCH-path bypass.",
  "id": "PYSEC-2026-185",
  "modified": "2026-06-03T10:54:36.415081Z",
  "published": "2026-06-01T09:16:18.907Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://lists.apache.org/thread/g8dqykpf1p90tysq8tln4qtkqwb1038s"
    },
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-33858"
    },
    {
      "type": "FIX",
      "url": "https://github.com/apache/airflow/pull/65915"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/advisories/GHSA-wr76-29cr-67w8"
    }
  ],
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

WID-SEC-W-2026-1761

Vulnerability from csaf_certbund - Published: 2026-05-31 22:00 - Updated: 2026-06-01 22:00

Summary

Apache Airflow: Mehrere Schwachstellen

Severity

Mittel

Scope

17 vulnerabilities in this advisory, including CVE-2026-42359.

CVE-2026-42359

Known affected: 1 product

Open the full advisory

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-2026-42359 (GCVE-0-2026-42359)

bit-airflow-2026-42359

Vulnerability from bitnami_vulndb

cleanstart-2026-iw40229

Vulnerability from cleanstart

FKIE_CVE-2026-42359

GHSA-WR76-29CR-67W8

PYSEC-2026-185

WID-SEC-W-2026-1761

Tags

Sightings

Nomenclature

Related by attack behaviour