Vulnerability-Lookup

CVE-2026-33264 (GCVE-0-2026-33264)

Vulnerability from cvelistv5 – Published: 2026-07-07 09:20 – Updated: 2026-11-03 06:53

Title

Apache Airflow: DAG author RCE on webserver via unrestricted import_string() in BaseSerialization.deserialize()

Summary

A bug in `BaseSerialization.deserialize()` allowed unrestricted `import_string()` of attacker-controlled class paths when the Scheduler / API Server loaded a serialized DAG: a DAG author could embed a malicious trigger into a DAG to gain remote code execution on the API Server / Scheduler process, crossing the Airflow security boundary that DAG-author code must never execute in those processes. Users are advised to upgrade to `apache-airflow` 3.3.0 or later. As a defense-in-depth mitigation, deployments where DAG-author trust is limited can restrict the `[core] allowed_deserialization_classes` config to a narrow allowlist.

Severity

9.8 (Critical)


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

SSVC

Exploitation: none Automatable: yes Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-07-07 00:00 UTC

CWE

CWE-502 - Deserialization of Untrusted Data

Assigner

apache CNA under the mitre root

CNA scorecard B 76/100 over 1257 records in the last 180 days details

References

4 references

URL	Tags
https://github.com/apache/airflow/pull/66002	patch
https://github.com/apache/airflow/pull/68528	patch
https://lists.apache.org/thread/otvdw8qt2y7xy2n5n…	vendor-advisory
http://www.openwall.com/lists/oss-security/2026/07/07/1

Impacted products

2 products

Vendor	Product	Version	CPE status
Apache Software Foundation	Apache Airflow	Affected: 0 , < 3.0.0 (semver)	guessed
Apache Software Foundation	Apache Airflow	Affected: 3.0.0 , < 3.3.0 (semver)	guessed

Credits

Ziyu Lin bugbunny.ai intadd (GitHub handle: @intadd) K Amogh Desai (@amoghrajesh) Jarek Potiuk

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2026-07-07T12:48:06.041Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "url": "http://www.openwall.com/lists/oss-security/2026/07/07/1"
          }
        ],
        "title": "CVE Program Container"
      },
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "NETWORK",
              "availabilityImpact": "HIGH",
              "baseScore": 9.8,
              "baseSeverity": "CRITICAL",
              "confidentialityImpact": "HIGH",
              "integrityImpact": "HIGH",
              "privilegesRequired": "NONE",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
              "version": "3.1"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2026-33264",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-07-07T00:00:00+00:00",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-07-08T03:56:40.205Z",
          "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",
          "packageURL": "pkg:pypi/apache-airflow",
          "product": "Apache Airflow",
          "vendor": "Apache Software Foundation",
          "versions": [
            {
              "lessThan": "3.0.0",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        },
        {
          "collectionURL": "https://pypi.python.org",
          "defaultStatus": "unaffected",
          "packageName": "apache-airflow-core",
          "packageURL": "pkg:pypi/apache-airflow-core",
          "product": "Apache Airflow",
          "vendor": "Apache Software Foundation",
          "versions": [
            {
              "lessThan": "3.3.0",
              "status": "affected",
              "version": "3.0.0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "Ziyu Lin"
        },
        {
          "lang": "en",
          "type": "tool",
          "value": "bugbunny.ai"
        },
        {
          "lang": "en",
          "type": "finder",
          "value": "intadd (GitHub handle: @intadd)"
        },
        {
          "lang": "en",
          "type": "finder",
          "value": "K"
        },
        {
          "lang": "en",
          "type": "remediation developer",
          "value": "Amogh Desai (@amoghrajesh)"
        },
        {
          "lang": "en",
          "type": "remediation developer",
          "value": "Jarek Potiuk"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "A bug in `BaseSerialization.deserialize()` allowed unrestricted `import_string()` of attacker-controlled class paths when the Scheduler / API Server loaded a serialized DAG: a DAG author could embed a malicious trigger into a DAG to gain remote code execution on the API Server / Scheduler process, crossing the Airflow security boundary that DAG-author code must never execute in those processes. Users are advised to upgrade to `apache-airflow` 3.3.0 or later. As a defense-in-depth mitigation, deployments where DAG-author trust is limited can restrict the `[core] allowed_deserialization_classes` config to a narrow allowlist."
            }
          ],
          "value": "A bug in `BaseSerialization.deserialize()` allowed unrestricted `import_string()` of attacker-controlled class paths when the Scheduler / API Server loaded a serialized DAG: a DAG author could embed a malicious trigger into a DAG to gain remote code execution on the API Server / Scheduler process, crossing the Airflow security boundary that DAG-author code must never execute in those processes. Users are advised to upgrade to `apache-airflow` 3.3.0 or later. As a defense-in-depth mitigation, deployments where DAG-author trust is limited can restrict the `[core] allowed_deserialization_classes` config to a narrow allowlist."
        }
      ],
      "metrics": [
        {
          "other": {
            "content": {
              "text": "important"
            },
            "type": "Textual description of severity"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-502",
              "description": "CWE-502: Deserialization of Untrusted Data",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-11-03T06:53:53.359Z",
        "orgId": "f0158376-9dc2-43b6-827c-5f631a4d8d09",
        "shortName": "apache"
      },
      "references": [
        {
          "tags": [
            "patch"
          ],
          "url": "https://github.com/apache/airflow/pull/66002"
        },
        {
          "tags": [
            "patch"
          ],
          "url": "https://github.com/apache/airflow/pull/68528"
        },
        {
          "tags": [
            "vendor-advisory"
          ],
          "url": "https://lists.apache.org/thread/otvdw8qt2y7xy2n5nq9xby9ky4rf5ltj"
        }
      ],
      "source": {
        "discovery": "UNKNOWN"
      },
      "title": "Apache Airflow: DAG author RCE on webserver via unrestricted import_string() in BaseSerialization.deserialize()",
      "x_generator": {
        "engine": "airflow-s/generate_cve_json.py"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "f0158376-9dc2-43b6-827c-5f631a4d8d09",
    "assignerShortName": "apache",
    "cveId": "CVE-2026-33264",
    "datePublished": "2026-07-07T09:20:18.518Z",
    "dateReserved": "2026-03-18T10:53:38.405Z",
    "dateUpdated": "2026-11-03T06:53:53.359Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-33264",
      "date": "2026-11-15",
      "epss": "0.01649",
      "percentile": "0.76899"
    },
    "nvd": {
      "cve": {
        "affected": [
          {
            "affectedData": [
              {
                "collectionURL": "https://pypi.python.org",
                "defaultStatus": "unaffected",
                "packageName": "apache-airflow",
                "packageURL": "pkg:pypi/apache-airflow",
                "product": "Apache Airflow",
                "vendor": "Apache Software Foundation",
                "versions": [
                  {
                    "lessThan": "3.0.0",
                    "status": "affected",
                    "version": "0",
                    "versionType": "semver"
                  }
                ]
              },
              {
                "collectionURL": "https://pypi.python.org",
                "defaultStatus": "unaffected",
                "packageName": "apache-airflow-core",
                "packageURL": "pkg:pypi/apache-airflow-core",
                "product": "Apache Airflow",
                "vendor": "Apache Software Foundation",
                "versions": [
                  {
                    "lessThan": "3.3.0",
                    "status": "affected",
                    "version": "3.0.0",
                    "versionType": "semver"
                  }
                ]
              }
            ],
            "source": "security@apache.org"
          }
        ],
        "configurations": [
          {
            "nodes": [
              {
                "cpeMatch": [
                  {
                    "criteria": "cpe:2.3:a:apache:airflow:*:*:*:*:*:*:*:*",
                    "matchCriteriaId": "6E334749-0D93-4319-9286-B9AC590F4698",
                    "versionEndExcluding": "3.3.0",
                    "vulnerable": true
                  }
                ],
                "negate": false,
                "operator": "OR"
              }
            ]
          }
        ],
        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "A bug in `BaseSerialization.deserialize()` allowed unrestricted `import_string()` of attacker-controlled class paths when the Scheduler / API Server loaded a serialized DAG: a DAG author could embed a malicious trigger into a DAG to gain remote code execution on the API Server / Scheduler process, crossing the Airflow security boundary that DAG-author code must never execute in those processes. Users are advised to upgrade to `apache-airflow` 3.3.0 or later. As a defense-in-depth mitigation, deployments where DAG-author trust is limited can restrict the `[core] allowed_deserialization_classes` config to a narrow allowlist."
          },
          {
            "lang": "es",
            "value": "Un error en \u2019BaseSerialization.deserialize()\u2019 permiti\u00f3 la \u2019import_string()\u2019 sin restricciones de rutas de clase controladas por el atacante cuando el Scheduler / servidor API carg\u00f3 un DAG serializado: un autor de DAG podr\u00eda incrustar un disparador malicioso en un DAG para obtener ejecuci\u00f3n remota de c\u00f3digo en el proceso del servidor API / Scheduler, cruzando el l\u00edmite de seguridad de Airflow que el c\u00f3digo del autor del DAG nunca debe ejecutarse en esos procesos. Se aconseja a los usuarios actualizar a \u2019apache-airflow\u2019 3.3.0 o posterior. Como mitigaci\u00f3n de defensa en profundidad, las implementaciones donde la confianza en el autor del DAG es limitada pueden restringir la configuraci\u00f3n \u2019[core] allowed_deserialization_classes\u2019 a una lista de permitidos estricta."
          }
        ],
        "id": "CVE-2026-33264",
        "lastModified": "2026-11-03T07:19:34.410",
        "metrics": {
          "cvssMetricV31": [
            {
              "cvssData": {
                "attackComplexity": "LOW",
                "attackVector": "NETWORK",
                "availabilityImpact": "HIGH",
                "baseScore": 9.8,
                "baseSeverity": "CRITICAL",
                "confidentialityImpact": "HIGH",
                "integrityImpact": "HIGH",
                "privilegesRequired": "NONE",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
                "version": "3.1"
              },
              "exploitabilityScore": 3.9,
              "impactScore": 5.9,
              "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "type": "Secondary"
            }
          ],
          "ssvcV203": [
            {
              "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "ssvcData": {
                "id": "CVE-2026-33264",
                "options": [
                  {
                    "exploitation": "none"
                  },
                  {
                    "automatable": "yes"
                  },
                  {
                    "technicalImpact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-07-07T00:00:00+00:00",
                "version": "2.0.3"
              }
            }
          ]
        },
        "published": "2026-07-07T10:16:40.443",
        "references": [
          {
            "source": "security@apache.org",
            "tags": [
              "Issue Tracking",
              "Patch"
            ],
            "url": "https://github.com/apache/airflow/pull/66002"
          },
          {
            "source": "security@apache.org",
            "tags": [
              "Issue Tracking",
              "Patch"
            ],
            "url": "https://github.com/apache/airflow/pull/68528"
          },
          {
            "source": "security@apache.org",
            "tags": [
              "Mailing List",
              "Vendor Advisory"
            ],
            "url": "https://lists.apache.org/thread/otvdw8qt2y7xy2n5nq9xby9ky4rf5ltj"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Mailing List",
              "Third Party Advisory"
            ],
            "url": "http://www.openwall.com/lists/oss-security/2026/07/07/1"
          }
        ],
        "sourceIdentifier": "security@apache.org",
        "vulnStatus": "Analyzed",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-502"
              }
            ],
            "source": "security@apache.org",
            "type": "Secondary"
          }
        ]
      }
    },
    "vulnrichment": {
      "containers": {
        "adp": [
          {
            "providerMetadata": {
              "dateUpdated": "2026-07-07T12:48:06.041Z",
              "orgId": "af854a3a-2127-422b-91ae-364da2661108",
              "shortName": "CVE"
            },
            "references": [
              {
                "url": "http://www.openwall.com/lists/oss-security/2026/07/07/1"
              }
            ],
            "title": "CVE Program Container"
          },
          {
            "metrics": [
              {
                "cvssV3_1": {
                  "attackComplexity": "LOW",
                  "attackVector": "NETWORK",
                  "availabilityImpact": "HIGH",
                  "baseScore": 9.8,
                  "baseSeverity": "CRITICAL",
                  "confidentialityImpact": "HIGH",
                  "integrityImpact": "HIGH",
                  "privilegesRequired": "NONE",
                  "scope": "UNCHANGED",
                  "userInteraction": "NONE",
                  "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
                  "version": "3.1"
                }
              },
              {
                "other": {
                  "content": {
                    "id": "CVE-2026-33264",
                    "options": [
                      {
                        "Exploitation": "none"
                      },
                      {
                        "Automatable": "yes"
                      },
                      {
                        "Technical Impact": "total"
                      }
                    ],
                    "role": "CISA Coordinator",
                    "timestamp": "2026-07-07T15:14:18.231929Z",
                    "version": "2.0.3"
                  },
                  "type": "ssvc"
                }
              }
            ],
            "providerMetadata": {
              "dateUpdated": "2026-07-07T15:13:47.920Z",
              "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",
              "packageURL": "pkg:pypi/apache-airflow",
              "product": "Apache Airflow",
              "vendor": "Apache Software Foundation",
              "versions": [
                {
                  "lessThan": "3.0.0",
                  "status": "affected",
                  "version": "0",
                  "versionType": "semver"
                }
              ]
            },
            {
              "collectionURL": "https://pypi.python.org",
              "defaultStatus": "unaffected",
              "packageName": "apache-airflow-core",
              "packageURL": "pkg:pypi/apache-airflow-core",
              "product": "Apache Airflow",
              "vendor": "Apache Software Foundation",
              "versions": [
                {
                  "lessThan": "3.3.0",
                  "status": "affected",
                  "version": "3.0.0",
                  "versionType": "semver"
                }
              ]
            }
          ],
          "credits": [
            {
              "lang": "en",
              "type": "finder",
              "value": "Ziyu Lin"
            },
            {
              "lang": "en",
              "type": "tool",
              "value": "bugbunny.ai"
            },
            {
              "lang": "en",
              "type": "finder",
              "value": "intadd (GitHub handle: @intadd)"
            },
            {
              "lang": "en",
              "type": "finder",
              "value": "K"
            },
            {
              "lang": "en",
              "type": "remediation developer",
              "value": "Amogh Desai (@amoghrajesh)"
            },
            {
              "lang": "en",
              "type": "remediation developer",
              "value": "Jarek Potiuk"
            }
          ],
          "descriptions": [
            {
              "lang": "en",
              "supportingMedia": [
                {
                  "base64": false,
                  "type": "text/html",
                  "value": "A bug in `BaseSerialization.deserialize()` allowed unrestricted `import_string()` of attacker-controlled class paths when the Scheduler / API Server loaded a serialized DAG: a DAG author could embed a malicious trigger into a DAG to gain remote code execution on the API Server / Scheduler process, crossing the Airflow security boundary that DAG-author code must never execute in those processes. Users are advised to upgrade to `apache-airflow` 3.3.0 or later. As a defense-in-depth mitigation, deployments where DAG-author trust is limited can restrict the `[core] allowed_deserialization_classes` config to a narrow allowlist."
                }
              ],
              "value": "A bug in `BaseSerialization.deserialize()` allowed unrestricted `import_string()` of attacker-controlled class paths when the Scheduler / API Server loaded a serialized DAG: a DAG author could embed a malicious trigger into a DAG to gain remote code execution on the API Server / Scheduler process, crossing the Airflow security boundary that DAG-author code must never execute in those processes. Users are advised to upgrade to `apache-airflow` 3.3.0 or later. As a defense-in-depth mitigation, deployments where DAG-author trust is limited can restrict the `[core] allowed_deserialization_classes` config to a narrow allowlist."
            }
          ],
          "metrics": [
            {
              "other": {
                "content": {
                  "text": "important"
                },
                "type": "Textual description of severity"
              }
            }
          ],
          "problemTypes": [
            {
              "descriptions": [
                {
                  "cweId": "CWE-502",
                  "description": "CWE-502: Deserialization of Untrusted Data",
                  "lang": "en",
                  "type": "CWE"
                }
              ]
            }
          ],
          "providerMetadata": {
            "dateUpdated": "2026-11-03T06:53:53.359Z",
            "orgId": "f0158376-9dc2-43b6-827c-5f631a4d8d09",
            "shortName": "apache"
          },
          "references": [
            {
              "tags": [
                "patch"
              ],
              "url": "https://github.com/apache/airflow/pull/66002"
            },
            {
              "tags": [
                "patch"
              ],
              "url": "https://github.com/apache/airflow/pull/68528"
            },
            {
              "tags": [
                "vendor-advisory"
              ],
              "url": "https://lists.apache.org/thread/otvdw8qt2y7xy2n5nq9xby9ky4rf5ltj"
            }
          ],
          "source": {
            "discovery": "UNKNOWN"
          },
          "title": "Apache Airflow: DAG author RCE on webserver via unrestricted import_string() in BaseSerialization.deserialize()",
          "x_generator": {
            "engine": "airflow-s/generate_cve_json.py"
          }
        }
      },
      "cveMetadata": {
        "assignerOrgId": "f0158376-9dc2-43b6-827c-5f631a4d8d09",
        "assignerShortName": "apache",
        "cveId": "CVE-2026-33264",
        "datePublished": "2026-07-07T09:20:18.518Z",
        "dateReserved": "2026-03-18T10:53:38.405Z",
        "dateUpdated": "2026-11-03T06:53:53.359Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}

bit-airflow-2026-33264

Vulnerability from bitnami_vulndb

Published

2026-07-09 08:41

Modified

2026-09-08 08:34

Summary

Apache Airflow: DAG author RCE on webserver via unrestricted import_string() in BaseSerialization.deserialize()

Details

A bug in BaseSerialization.deserialize() allowed unrestricted import_string() of attacker-controlled class paths when the Scheduler / API Server loaded a serialized DAG: a DAG author could embed a malicious trigger into a DAG to gain remote code execution on the API Server / Scheduler process, crossing the Airflow security boundary that DAG-author code must never execute in those processes. Users are advised to upgrade to apache-airflow 3.3.0 or later. As a defense-in-depth mitigation, deployments where DAG-author trust is limited can restrict the [core] allowed_deserialization_classes config to a narrow allowlist.

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "Bitnami",
        "name": "airflow",
        "purl": "pkg:bitnami/airflow"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "3.3.0"
            }
          ],
          "type": "SEMVER"
        }
      ],
      "severity": [
        {
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "type": "CVSS_V3"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-33264"
  ],
  "database_specific": {
    "cpes": [
      "cpe:2.3:a:apache:airflow:*:*:*:*:*:*:*:*"
    ],
    "severity": "Critical"
  },
  "details": "A bug in `BaseSerialization.deserialize()` allowed unrestricted `import_string()` of attacker-controlled class paths when the Scheduler / API Server loaded a serialized DAG: a DAG author could embed a malicious trigger into a DAG to gain remote code execution on the API Server / Scheduler process, crossing the Airflow security boundary that DAG-author code must never execute in those processes. Users are advised to upgrade to `apache-airflow` 3.3.0 or later. As a defense-in-depth mitigation, deployments where DAG-author trust is limited can restrict the `[core] allowed_deserialization_classes` config to a narrow allowlist.",
  "id": "BIT-airflow-2026-33264",
  "modified": "2026-09-08T08:34:36.952Z",
  "published": "2026-07-09T08:41:48.718Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "http://www.openwall.com/lists/oss-security/2026/07/07/1"
    },
    {
      "type": "FIX",
      "url": "https://github.com/apache/airflow/pull/66002"
    },
    {
      "type": "FIX",
      "url": "https://github.com/apache/airflow/pull/68528"
    },
    {
      "type": "ADVISORY",
      "url": "https://lists.apache.org/thread/otvdw8qt2y7xy2n5nq9xby9ky4rf5ltj"
    },
    {
      "type": "WEB",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-33264"
    }
  ],
  "schema_version": "1.6.2",
  "summary": "Apache Airflow: DAG author RCE on webserver via unrestricted import_string() in BaseSerialization.deserialize()"
}

CLEANSTART-2026-VP80273 (CVE-2026-33264)

Vulnerability from cleanstart – Published: 2026-10-10 00:41 – Updated: 2026-10-09 07:45 – Source website

Summary

bug in `BaseSerialization

Details

Security vulnerability affects the airflow-3 package. A bug in `BaseSerialization.

Severity

9.8 (Critical)


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

References

URL

Type

	https://github.com/cleanstart-dev/cleanstart-secu…	ADVISORY
	https://osv.dev/vulnerability/CVE-2026-33264	WEB
	https://nvd.nist.gov/vuln/detail/CVE-2026-33264	WEB

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "CleanStart",
        "name": "airflow-3",
        "purl": "pkg:apk/cleanstart/airflow-3"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "3.2.2-r8"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "credits": [],
  "database_specific": {},
  "details": "Security vulnerability affects the airflow-3 package. A bug in `BaseSerialization.",
  "id": "CLEANSTART-2026-VP80273",
  "modified": "2026-10-09T07:45:14Z",
  "published": "2026-10-10T00:41:46.501884Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/cleanstart-dev/cleanstart-security-advisories/tree/main/advisories/2026/CLEANSTART-2026-VP80273.json"
    },
    {
      "type": "WEB",
      "url": "https://osv.dev/vulnerability/CVE-2026-33264"
    },
    {
      "type": "WEB",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-33264"
    }
  ],
  "related": [],
  "schema_version": "1.7.3",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "bug in `BaseSerialization",
  "upstream": [
    "CVE-2026-33264"
  ]
}

FKIE_CVE-2026-33264

Vulnerability from fkie_nvd - Published: 2026-07-07 10:16 - Updated: 2026-11-03 07:19

Severity

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

Summary

References

URL	Tags
security@apache.org	https://github.com/apache/airflow/pull/66002	Issue Tracking, Patch
security@apache.org	https://github.com/apache/airflow/pull/68528	Issue Tracking, Patch
security@apache.org	https://lists.apache.org/thread/otvdw8qt2y7xy2n5nq9xby9ky4rf5ltj	Mailing List, Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108	http://www.openwall.com/lists/oss-security/2026/07/07/1	Mailing List, 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",
          "packageURL": "pkg:pypi/apache-airflow",
          "product": "Apache Airflow",
          "vendor": "Apache Software Foundation",
          "versions": [
            {
              "lessThan": "3.0.0",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        },
        {
          "collectionURL": "https://pypi.python.org",
          "defaultStatus": "unaffected",
          "packageName": "apache-airflow-core",
          "packageURL": "pkg:pypi/apache-airflow-core",
          "product": "Apache Airflow",
          "vendor": "Apache Software Foundation",
          "versions": [
            {
              "lessThan": "3.3.0",
              "status": "affected",
              "version": "3.0.0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "source": "security@apache.org"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:apache:airflow:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "6E334749-0D93-4319-9286-B9AC590F4698",
              "versionEndExcluding": "3.3.0",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "A bug in `BaseSerialization.deserialize()` allowed unrestricted `import_string()` of attacker-controlled class paths when the Scheduler / API Server loaded a serialized DAG: a DAG author could embed a malicious trigger into a DAG to gain remote code execution on the API Server / Scheduler process, crossing the Airflow security boundary that DAG-author code must never execute in those processes. Users are advised to upgrade to `apache-airflow` 3.3.0 or later. As a defense-in-depth mitigation, deployments where DAG-author trust is limited can restrict the `[core] allowed_deserialization_classes` config to a narrow allowlist."
    },
    {
      "lang": "es",
      "value": "Un error en \u2019BaseSerialization.deserialize()\u2019 permiti\u00f3 la \u2019import_string()\u2019 sin restricciones de rutas de clase controladas por el atacante cuando el Scheduler / servidor API carg\u00f3 un DAG serializado: un autor de DAG podr\u00eda incrustar un disparador malicioso en un DAG para obtener ejecuci\u00f3n remota de c\u00f3digo en el proceso del servidor API / Scheduler, cruzando el l\u00edmite de seguridad de Airflow que el c\u00f3digo del autor del DAG nunca debe ejecutarse en esos procesos. Se aconseja a los usuarios actualizar a \u2019apache-airflow\u2019 3.3.0 o posterior. Como mitigaci\u00f3n de defensa en profundidad, las implementaciones donde la confianza en el autor del DAG es limitada pueden restringir la configuraci\u00f3n \u2019[core] allowed_deserialization_classes\u2019 a una lista de permitidos estricta."
    }
  ],
  "id": "CVE-2026-33264",
  "lastModified": "2026-11-03T07:19:34.410",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 9.8,
          "baseSeverity": "CRITICAL",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 5.9,
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-33264",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-07-07T00:00:00+00:00",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-07-07T10:16:40.443",
  "references": [
    {
      "source": "security@apache.org",
      "tags": [
        "Issue Tracking",
        "Patch"
      ],
      "url": "https://github.com/apache/airflow/pull/66002"
    },
    {
      "source": "security@apache.org",
      "tags": [
        "Issue Tracking",
        "Patch"
      ],
      "url": "https://github.com/apache/airflow/pull/68528"
    },
    {
      "source": "security@apache.org",
      "tags": [
        "Mailing List",
        "Vendor Advisory"
      ],
      "url": "https://lists.apache.org/thread/otvdw8qt2y7xy2n5nq9xby9ky4rf5ltj"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Mailing List",
        "Third Party Advisory"
      ],
      "url": "http://www.openwall.com/lists/oss-security/2026/07/07/1"
    }
  ],
  "sourceIdentifier": "security@apache.org",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-502"
        }
      ],
      "source": "security@apache.org",
      "type": "Secondary"
    }
  ]
}

GHSA-2943-9672-R45W

Vulnerability from github – Published: 2026-07-07 12:31 – Updated: 2026-09-04 19:23

Summary

Apache Airflow allows code execution through unsafe serialized DAG deserialization

Details

Severity

9.8 (Critical)


                  
                    CVSS:3.1/AV:N/AC:L/PR:N/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": "0"
            },
            {
              "fixed": "3.3.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-33264"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-502"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-09-04T19:23:01Z",
    "nvd_published_at": "2026-07-07T10:16:40Z",
    "severity": "CRITICAL"
  },
  "details": "A bug in `BaseSerialization.deserialize()` allowed unrestricted `import_string()` of attacker-controlled class paths when the Scheduler / API Server loaded a serialized DAG: a DAG author could embed a malicious trigger into a DAG to gain remote code execution on the API Server / Scheduler process, crossing the Airflow security boundary that DAG-author code must never execute in those processes. Users are advised to upgrade to `apache-airflow` 3.3.0 or later. As a defense-in-depth mitigation, deployments where DAG-author trust is limited can restrict the `[core] allowed_deserialization_classes` config to a narrow allowlist.",
  "id": "GHSA-2943-9672-r45w",
  "modified": "2026-09-04T19:23:01Z",
  "published": "2026-07-07T12:31:35Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-33264"
    },
    {
      "type": "WEB",
      "url": "https://github.com/apache/airflow/pull/66002"
    },
    {
      "type": "WEB",
      "url": "https://github.com/apache/airflow/pull/68528"
    },
    {
      "type": "WEB",
      "url": "https://github.com/apache/airflow/commit/69b6c54ef17b048ebb0e9a656d0d9e1c99480d6b"
    },
    {
      "type": "WEB",
      "url": "https://github.com/apache/airflow/commit/7e9bdb245e09373d91fcb7bda575ad4be63aa28d"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/apache/airflow"
    },
    {
      "type": "WEB",
      "url": "https://github.com/pypa/advisory-database/tree/main/vulns/apache-airflow/PYSEC-2026-2082.yaml"
    },
    {
      "type": "WEB",
      "url": "https://lists.apache.org/thread/otvdw8qt2y7xy2n5nq9xby9ky4rf5ltj"
    },
    {
      "type": "WEB",
      "url": "http://www.openwall.com/lists/oss-security/2026/07/07/1"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Apache Airflow allows code execution through unsafe serialized DAG deserialization"
}

PYSEC-2026-2082

Vulnerability from pysec - Published: 2026-07-07 10:16 - Updated: 2026-07-09 10:35

Details

Severity

9.8 (Critical)


                  
                    CVSS:3.1/AV:N/AC:L/PR:N/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": "0"
            },
            {
              "fixed": "3.3.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.10.0",
        "1.10.1",
        "1.10.10",
        "1.10.10rc1",
        "1.10.10rc2",
        "1.10.10rc3",
        "1.10.10rc4",
        "1.10.10rc5",
        "1.10.11",
        "1.10.11rc1",
        "1.10.11rc2",
        "1.10.12",
        "1.10.12rc1",
        "1.10.12rc2",
        "1.10.12rc3",
        "1.10.12rc4",
        "1.10.13",
        "1.10.13rc1",
        "1.10.14",
        "1.10.14rc1",
        "1.10.14rc2",
        "1.10.14rc3",
        "1.10.14rc4",
        "1.10.15",
        "1.10.15rc1",
        "1.10.1b1",
        "1.10.1rc2",
        "1.10.2",
        "1.10.2b2",
        "1.10.2rc1",
        "1.10.2rc2",
        "1.10.2rc3",
        "1.10.3",
        "1.10.3b1",
        "1.10.3b2",
        "1.10.3rc1",
        "1.10.3rc2",
        "1.10.4",
        "1.10.4b2",
        "1.10.4rc1",
        "1.10.4rc2",
        "1.10.4rc3",
        "1.10.4rc4",
        "1.10.4rc5",
        "1.10.5",
        "1.10.5rc1",
        "1.10.6",
        "1.10.6rc1",
        "1.10.6rc2",
        "1.10.7",
        "1.10.7rc1",
        "1.10.7rc2",
        "1.10.7rc3",
        "1.10.8",
        "1.10.8rc1",
        "1.10.9",
        "1.10.9rc1",
        "1.8.1",
        "1.8.2",
        "1.8.2rc1",
        "1.9.0",
        "2.0.0",
        "2.0.0b1",
        "2.0.0b2",
        "2.0.0b3",
        "2.0.0rc1",
        "2.0.0rc2",
        "2.0.0rc3",
        "2.0.1",
        "2.0.1rc1",
        "2.0.1rc2",
        "2.0.2",
        "2.0.2rc1",
        "2.1.0",
        "2.1.0rc1",
        "2.1.0rc2",
        "2.1.1",
        "2.1.1rc1",
        "2.1.2",
        "2.1.2rc1",
        "2.1.3",
        "2.1.3rc1",
        "2.1.4",
        "2.1.4rc1",
        "2.1.4rc2",
        "2.10.0",
        "2.10.0b1",
        "2.10.0b2",
        "2.10.0rc1",
        "2.10.1",
        "2.10.1rc1",
        "2.10.2",
        "2.10.2rc1",
        "2.10.3",
        "2.10.3rc1",
        "2.10.3rc2",
        "2.10.4",
        "2.10.4rc1",
        "2.10.5",
        "2.10.5rc1",
        "2.11.0",
        "2.11.0rc1",
        "2.11.1",
        "2.11.1rc1",
        "2.11.1rc2",
        "2.11.2",
        "2.11.2rc1",
        "2.2.0",
        "2.2.0b1",
        "2.2.0b2",
        "2.2.0rc1",
        "2.2.1",
        "2.2.1rc1",
        "2.2.1rc2",
        "2.2.2",
        "2.2.2rc1",
        "2.2.2rc2",
        "2.2.3",
        "2.2.3rc1",
        "2.2.3rc2",
        "2.2.4",
        "2.2.4rc1",
        "2.2.5",
        "2.2.5rc1",
        "2.2.5rc2",
        "2.2.5rc3",
        "2.3.0",
        "2.3.0b1",
        "2.3.0rc1",
        "2.3.0rc2",
        "2.3.1",
        "2.3.1rc1",
        "2.3.2",
        "2.3.2rc1",
        "2.3.2rc2",
        "2.3.3",
        "2.3.3rc1",
        "2.3.3rc2",
        "2.3.3rc3",
        "2.3.4",
        "2.3.4rc1",
        "2.4.0",
        "2.4.0b1",
        "2.4.0rc1",
        "2.4.1",
        "2.4.1rc1",
        "2.4.2",
        "2.4.2rc1",
        "2.4.3",
        "2.4.3rc1",
        "2.5.0",
        "2.5.0rc1",
        "2.5.0rc2",
        "2.5.0rc3",
        "2.5.1",
        "2.5.1rc1",
        "2.5.1rc2",
        "2.5.2",
        "2.5.2rc1",
        "2.5.2rc2",
        "2.5.3",
        "2.5.3rc1",
        "2.5.3rc2",
        "2.6.0",
        "2.6.0b1",
        "2.6.0rc1",
        "2.6.0rc2",
        "2.6.0rc3",
        "2.6.0rc4",
        "2.6.0rc5",
        "2.6.1",
        "2.6.1rc1",
        "2.6.1rc2",
        "2.6.1rc3",
        "2.6.2",
        "2.6.2rc1",
        "2.6.2rc2",
        "2.6.3",
        "2.6.3rc1",
        "2.7.0",
        "2.7.0b1",
        "2.7.0rc1",
        "2.7.0rc2",
        "2.7.1",
        "2.7.1rc1",
        "2.7.1rc2",
        "2.7.2",
        "2.7.2rc1",
        "2.7.3",
        "2.7.3rc1",
        "2.8.0",
        "2.8.0b1",
        "2.8.0rc1",
        "2.8.0rc2",
        "2.8.0rc3",
        "2.8.0rc4",
        "2.8.1",
        "2.8.1rc1",
        "2.8.2",
        "2.8.2rc1",
        "2.8.2rc2",
        "2.8.2rc3",
        "2.8.3",
        "2.8.3rc1",
        "2.8.4",
        "2.8.4rc1",
        "2.9.0",
        "2.9.0b1",
        "2.9.0b2",
        "2.9.0rc1",
        "2.9.0rc2",
        "2.9.0rc3",
        "2.9.1",
        "2.9.1rc1",
        "2.9.1rc2",
        "2.9.2",
        "2.9.2rc1",
        "2.9.3",
        "2.9.3rc1",
        "3.0.0",
        "3.0.0b4",
        "3.0.0rc1",
        "3.0.0rc1.post1",
        "3.0.0rc1.post2",
        "3.0.0rc1.post3",
        "3.0.0rc1.post4",
        "3.0.0rc2",
        "3.0.0rc3",
        "3.0.0rc4",
        "3.0.1",
        "3.0.1rc1",
        "3.0.2",
        "3.0.2rc1",
        "3.0.2rc2",
        "3.0.3",
        "3.0.3rc1",
        "3.0.3rc2",
        "3.0.3rc3",
        "3.0.3rc4",
        "3.0.3rc5",
        "3.0.3rc6",
        "3.0.4",
        "3.0.4rc1",
        "3.0.4rc2",
        "3.0.5",
        "3.0.5rc1",
        "3.0.5rc2",
        "3.0.5rc3",
        "3.0.6",
        "3.0.6rc1",
        "3.0.6rc2",
        "3.1.0",
        "3.1.0b1",
        "3.1.0b2",
        "3.1.0rc1",
        "3.1.0rc2",
        "3.1.1",
        "3.1.1rc1",
        "3.1.1rc2",
        "3.1.2",
        "3.1.2rc1",
        "3.1.2rc2",
        "3.1.3",
        "3.1.3rc1",
        "3.1.4",
        "3.1.4rc1",
        "3.1.4rc2",
        "3.1.5",
        "3.1.5rc1",
        "3.1.6",
        "3.1.6rc1",
        "3.1.7",
        "3.1.7rc1",
        "3.1.7rc2",
        "3.1.8",
        "3.1.8rc1",
        "3.1.8rc2",
        "3.2.0",
        "3.2.0b1",
        "3.2.0b2",
        "3.2.0rc1",
        "3.2.0rc2",
        "3.2.1",
        "3.2.1rc1",
        "3.2.1rc2",
        "3.2.1rc3",
        "3.2.2",
        "3.2.2rc1",
        "3.2.2rc2",
        "3.2.2rc3",
        "3.3.0b1",
        "3.3.0b2",
        "3.3.0rc1",
        "3.3.0rc2"
      ]
    }
  ],
  "aliases": [
    "CVE-2026-33264",
    "GHSA-2943-9672-r45w"
  ],
  "details": "A bug in `BaseSerialization.deserialize()` allowed unrestricted `import_string()` of attacker-controlled class paths when the Scheduler / API Server loaded a serialized DAG: a DAG author could embed a malicious trigger into a DAG to gain remote code execution on the API Server / Scheduler process, crossing the Airflow security boundary that DAG-author code must never execute in those processes. Users are advised to upgrade to `apache-airflow` 3.3.0 or later. As a defense-in-depth mitigation, deployments where DAG-author trust is limited can restrict the `[core] allowed_deserialization_classes` config to a narrow allowlist.",
  "id": "PYSEC-2026-2082",
  "modified": "2026-07-09T10:35:31.607691Z",
  "published": "2026-07-07T10:16:40.443Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "http://www.openwall.com/lists/oss-security/2026/07/07/1"
    },
    {
      "type": "ADVISORY",
      "url": "https://lists.apache.org/thread/otvdw8qt2y7xy2n5nq9xby9ky4rf5ltj"
    },
    {
      "type": "FIX",
      "url": "https://github.com/apache/airflow/pull/66002"
    },
    {
      "type": "FIX",
      "url": "https://github.com/apache/airflow/pull/68528"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/advisories/GHSA-2943-9672-r45w"
    }
  ],
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

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.

Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

Order JSON

How durations are calculated

Following the VTEM framework (Black Hat USA 2015), time to patch starts when the vendor or a coordinator was informed, total time to patch at discovery, and disclosure to patch at public disclosure; vendor response time runs from the report to its acknowledgement. Time to exploit and time unpatched start at the earliest discovery or report, falling back to public disclosure. Unpatched time ends at the first recorded patch, or the calculation time when no patch is recorded. Exploitation to patch shows the interval between those two events; a published proof of concept is a public exploit, not exploitation.

Each result shows its source dates. A negative interval means the end event came first; when date-only inputs leave the order open, the result says so. Date-only inputs are approximate. The earliest evidence wins: KEV report dates and sightings are labelled as such. Records describing another vulnerability are listed but never calculated from, and a PoC alone does not establish exploitation. Missing patch evidence does not prove that no patch exists. Filters below change the event list only.

Publication & reservation Sightings KEV catalogs Other timestamps

Loading timeline…

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-2026-33264 (GCVE-0-2026-33264)

bit-airflow-2026-33264

Vulnerability from bitnami_vulndb

CLEANSTART-2026-VP80273 (CVE-2026-33264)

FKIE_CVE-2026-33264

GHSA-2943-9672-R45W

PYSEC-2026-2082

Tags

Sightings

Nomenclature

Vulnerability timeline

Related by attack behaviour