Vulnerability-Lookup

FKIE_CVE-2026-76186

Vulnerability from fkie_nvd - Published: 2026-09-16 10:16 - Updated: 2026-09-18 14:26

Severity

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

Summary

Apache Airflow Keycloak provider: from Airflow 3.3 the Keycloak auth manager takes a user's identity from the signed Airflow session token but takes the Keycloak access and refresh tokens used for every authorization decision from separate, unauthenticated cookies, and never checks that the two describe the same subject. A user who holds any valid Airflow login of their own, together with another subject's Keycloak access or refresh token obtained out of band, can pair the two: Airflow then authorizes requests with the foreign token's privileges while the session identity, audit log and cache keys continue to name the attacker's own account. The refresh path re-issues an Airflow session token for the original identity carrying the foreign tokens, so the mismatched pairing survives across sessions. Affects deployments running Airflow 3.3 or later with the Keycloak auth manager. Earlier versions carried the Keycloak tokens inside the signed session token, so the binding existed and was lost when they moved into separate cookies. Users of apache-airflow-providers-keycloak are recommended to upgrade to version 0.10.0 or later, which binds the cookie-supplied tokens to the session identity.

References

URL	Tags
security@apache.org	https://github.com/apache/airflow/pull/72207	Patch, Vendor Advisory
security@apache.org	https://lists.apache.org/thread/5cqh5ojl3718ogb0q1dcd9vdr47z7gp3	Mailing List, Vendor Advisory
security@apache.org	https://lists.apache.org/thread/5cqh5ojl3718ogb0q1dcd9vdr47z7gp3?users@airflow.apache.org	Mailing List, Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108	http://www.openwall.com/lists/oss-security/2026/09/15/8	Mailing List, Vendor Advisory

Impacted products

	Vendor	Product	Version
	apache	apache-airflow-providers-keycloak	*

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "collectionURL": "https://pypi.python.org",
          "defaultStatus": "unaffected",
          "packageName": "apache-airflow-providers-keycloak",
          "packageURL": "pkg:pypi/apache-airflow-providers-keycloak",
          "product": "Apache Airflow Keycloak provider",
          "vendor": "Apache Software Foundation",
          "versions": [
            {
              "lessThan": "0.10.0",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "source": "security@apache.org"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:apache:apache-airflow-providers-keycloak:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "2C3ACC87-2E96-49E5-B30E-319A4CAF6F81",
              "versionEndExcluding": "0.10.0",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Apache Airflow Keycloak provider: from Airflow 3.3 the Keycloak auth manager takes a user\u0027s identity from the signed Airflow session token but takes the Keycloak access and refresh tokens used for every authorization decision from separate, unauthenticated cookies, and never checks that the two describe the same subject. A user who holds any valid Airflow login of their own, together with another subject\u0027s Keycloak access or refresh token obtained out of band, can pair the two: Airflow then authorizes requests with the foreign token\u0027s privileges while the session identity, audit log and cache keys continue to name the attacker\u0027s own account. The refresh path re-issues an Airflow session token for the original identity carrying the foreign tokens, so the mismatched pairing survives across sessions.\n\nAffects deployments running Airflow 3.3 or later with the Keycloak auth manager. Earlier versions carried the Keycloak tokens inside the signed session token, so the binding existed and was lost when they moved into separate cookies.\n\nUsers of apache-airflow-providers-keycloak are recommended to upgrade to version 0.10.0 or later, which binds the cookie-supplied tokens to the session identity."
    }
  ],
  "id": "CVE-2026-76186",
  "lastModified": "2026-09-18T14:26:45.073",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 9.1,
          "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:N",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 5.2,
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-76186",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-09-17T19:22:24.154515Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-09-16T10:16:52.793",
  "references": [
    {
      "source": "security@apache.org",
      "tags": [
        "Patch",
        "Vendor Advisory"
      ],
      "url": "https://github.com/apache/airflow/pull/72207"
    },
    {
      "source": "security@apache.org",
      "tags": [
        "Mailing List",
        "Vendor Advisory"
      ],
      "url": "https://lists.apache.org/thread/5cqh5ojl3718ogb0q1dcd9vdr47z7gp3"
    },
    {
      "source": "security@apache.org",
      "tags": [
        "Mailing List",
        "Vendor Advisory"
      ],
      "url": "https://lists.apache.org/thread/5cqh5ojl3718ogb0q1dcd9vdr47z7gp3?users@airflow.apache.org"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Mailing List",
        "Vendor Advisory"
      ],
      "url": "http://www.openwall.com/lists/oss-security/2026/09/15/8"
    }
  ],
  "sourceIdentifier": "security@apache.org",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-565"
        }
      ],
      "source": "security@apache.org",
      "type": "Secondary"
    }
  ]
}

CVE-2026-76186 (GCVE-0-2026-76186)

Vulnerability from cvelistv5 – Published: 2026-09-16 09:09 – Updated: 2026-09-17 19:22

Title

Apache Airflow Keycloak provider: Keycloak token cookies not bound to Airflow session identity

Summary

Severity

9.1 (Critical)


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

SSVC

Exploitation: none Automatable: yes Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-17 19:22 UTC

CWE

CWE-565 - Reliance on Cookies without Validation and Integrity Checking in a Security Decision

Assigner

apache mitre root

References

4 references

URL	Tags
https://github.com/apache/airflow/pull/72207	patch
https://lists.apache.org/thread/5cqh5ojl3718ogb0q…	vendor-advisory
https://lists.apache.org/thread/5cqh5ojl3718ogb0q…	vendor-advisory
http://www.openwall.com/lists/oss-security/2026/09/15/8

Impacted products

1 product

Vendor	Product	Version
Apache Software Foundation	Apache Airflow Keycloak provider	Affected: 0 , < 0.10.0 (semver)

Credits

Claude Security Scans Jarek Potiuk

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2026-09-16T09:12:55.896Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "url": "http://www.openwall.com/lists/oss-security/2026/09/15/8"
          }
        ],
        "title": "CVE Program Container"
      },
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "NETWORK",
              "availabilityImpact": "NONE",
              "baseScore": 9.1,
              "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:N",
              "version": "3.1"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2026-76186",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-09-17T19:22:24.154515Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-09-17T19:22:48.731Z",
          "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-providers-keycloak",
          "packageURL": "pkg:pypi/apache-airflow-providers-keycloak",
          "product": "Apache Airflow Keycloak provider",
          "vendor": "Apache Software Foundation",
          "versions": [
            {
              "lessThan": "0.10.0",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "tool",
          "value": "Claude Security Scans"
        },
        {
          "lang": "en",
          "type": "remediation developer",
          "value": "Jarek Potiuk"
        }
      ],
      "descriptions": [
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          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "Apache Airflow Keycloak provider: from Airflow 3.3 the Keycloak auth manager takes a user\u0026#x27;s identity from the signed Airflow session token but takes the Keycloak access and refresh tokens used for every authorization decision from separate, unauthenticated cookies, and never checks that the two describe the same subject. A user who holds any valid Airflow login of their own, together with another subject\u0026#x27;s Keycloak access or refresh token obtained out of band, can pair the two: Airflow then authorizes requests with the foreign token\u0026#x27;s privileges while the session identity, audit log and cache keys continue to name the attacker\u0026#x27;s own account. The refresh path re-issues an Airflow session token for the original identity carrying the foreign tokens, so the mismatched pairing survives across sessions.\u003cbr\u003e\u003cbr\u003eAffects deployments running Airflow 3.3 or later with the Keycloak auth manager. Earlier versions carried the Keycloak tokens inside the signed session token, so the binding existed and was lost when they moved into separate cookies.\u003cbr\u003e\u003cbr\u003eUsers of apache-airflow-providers-keycloak are recommended to upgrade to version 0.10.0 or later, which binds the cookie-supplied tokens to the session identity."
            }
          ],
          "value": "Apache Airflow Keycloak provider: from Airflow 3.3 the Keycloak auth manager takes a user\u0027s identity from the signed Airflow session token but takes the Keycloak access and refresh tokens used for every authorization decision from separate, unauthenticated cookies, and never checks that the two describe the same subject. A user who holds any valid Airflow login of their own, together with another subject\u0027s Keycloak access or refresh token obtained out of band, can pair the two: Airflow then authorizes requests with the foreign token\u0027s privileges while the session identity, audit log and cache keys continue to name the attacker\u0027s own account. The refresh path re-issues an Airflow session token for the original identity carrying the foreign tokens, so the mismatched pairing survives across sessions.\n\nAffects deployments running Airflow 3.3 or later with the Keycloak auth manager. Earlier versions carried the Keycloak tokens inside the signed session token, so the binding existed and was lost when they moved into separate cookies.\n\nUsers of apache-airflow-providers-keycloak are recommended to upgrade to version 0.10.0 or later, which binds the cookie-supplied tokens to the session identity."
        }
      ],
      "metrics": [
        {
          "other": {
            "content": {
              "text": "moderate"
            },
            "type": "Textual description of severity"
          }
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      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-565",
              "description": "CWE-565: Reliance on Cookies without Validation and Integrity Checking in a Security Decision",
              "lang": "en",
              "type": "CWE"
            }
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      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-16T14:54:39.000Z",
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      "references": [
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          "url": "https://lists.apache.org/thread/5cqh5ojl3718ogb0q1dcd9vdr47z7gp3?users@airflow.apache.org"
        },
        {
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          "url": "https://lists.apache.org/thread/5cqh5ojl3718ogb0q1dcd9vdr47z7gp3"
        }
      ],
      "source": {
        "discovery": "UNKNOWN"
      },
      "title": "Apache Airflow Keycloak provider: Keycloak token cookies not bound to Airflow session identity",
      "x_generator": {
        "engine": "airflow-s/generate_cve_json.py"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "f0158376-9dc2-43b6-827c-5f631a4d8d09",
    "assignerShortName": "apache",
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    "datePublished": "2026-09-16T09:09:57.800Z",
    "dateReserved": "2026-08-19T10:41:19.914Z",
    "dateUpdated": "2026-09-17T19:22:48.731Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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.

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FKIE_CVE-2026-76186

CVE-2026-76186 (GCVE-0-2026-76186)

Tags

Sightings

Nomenclature

Related by attack behaviour