Vulnerability-Lookup

CVE-2026-82355 (GCVE-0-2026-82355)

Vulnerability from cvelistv5 – Published: 2026-09-21 14:32 – Updated: 2026-09-21 15:26

Title

Apache Airflow: Session cookie silently overrides explicit Authorization bearer header, enabling session fixation

Summary

When a request to the Airflow core API carries both a session cookie and an explicit `Authorization: Bearer` token, Airflow resolves the caller from the cookie and ignores the bearer token, inverting the intended precedence of bearer over cookie. The request then executes -- and is recorded in the audit log -- as the cookie's principal rather than the identity the client explicitly presented. Only Apache Airflow 3.3.0 and 3.3.1 are affected. Earlier releases do not contain the code path that caches the cookie-derived user, and are not vulnerable. Exploiting this requires an attacker to first place a valid session cookie of their own into the victim's browser or client: for example by cookie tossing from a sibling subdomain, through cross-site scripting in a separate application sharing a parent domain, or via a shared workstation. Deployments that host the Airflow UI on a domain shared with other applications are therefore the most exposed; a deployment on a dedicated domain with no co-hosted applications is not reachable this way. The consequence is principal confusion and misattributed audit records rather than a direct privilege escalation. Users of 3.3.0 or 3.3.1 should upgrade to Apache Airflow 3.3.2 or later, which resolves the caller from the explicitly supplied credential whenever one is present.

Severity

4.2 (Medium)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-21 15:23 UTC

CWE

CWE-384 - Session Fixation

Assigner

apache mitre root

References

3 references

URL	Tags
https://github.com/apache/airflow/pull/72225	patch
https://github.com/apache/airflow/pull/72723	patch
https://lists.apache.org/thread/3p7zpdvv40tn01m0x…	vendor-advisory

Impacted products

1 product

Vendor	Product	Version	CPE status
Apache Software Foundation	Apache Airflow	Affected: 3.3.0 , < 3.3.2 (semver)	guessed

Credits

Claude Security Scans Jarek Potiuk

Show details on NVD website

JSON

To clipboard

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FKIE_CVE-2026-82355

Vulnerability from fkie_nvd - Published: 2026-09-21 15:17 - Updated: 2026-09-21 16:17

Severity

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

Summary

References

	URL	Tags
	security@apache.org	https://github.com/apache/airflow/pull/72225
	security@apache.org	https://github.com/apache/airflow/pull/72723
	security@apache.org	https://lists.apache.org/thread/3p7zpdvv40tn01m0xk5mt2rxg88mw8w1

Impacted products

	Vendor	Product	Version

JSON

To clipboard

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      ],
      "source": "security@apache.org",
      "type": "Secondary"
    }
  ]
}

GHSA-9X6G-JFJ6-R3JG

Vulnerability from github – Published: 2026-09-21 15:32 – Updated: 2026-09-21 15:32

Details

When a request to the Airflow core API carries both a session cookie and an explicit Authorization: Bearer token, Airflow resolves the caller from the cookie and ignores the bearer token, inverting the intended precedence of bearer over cookie. The request then executes -- and is recorded in the audit log -- as the cookie's principal rather than the identity the client explicitly presented.

Only Apache Airflow 3.3.0 and 3.3.1 are affected. Earlier releases do not contain the code path that caches the cookie-derived user, and are not vulnerable.

Exploiting this requires an attacker to first place a valid session cookie of their own into the victim's browser or client: for example by cookie tossing from a sibling subdomain, through cross-site scripting in a separate application sharing a parent domain, or via a shared workstation. Deployments that host the Airflow UI on a domain shared with other applications are therefore the most exposed; a deployment on a dedicated domain with no co-hosted applications is not reachable this way. The consequence is principal confusion and misattributed audit records rather than a direct privilege escalation.

Users of 3.3.0 or 3.3.1 should upgrade to Apache Airflow 3.3.2 or later, which resolves the caller from the explicitly supplied credential whenever one is present.

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{
  "affected": [],
  "aliases": [
    "CVE-2026-82355"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-384"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-09-21T15:17:32Z",
    "severity": null
  },
  "details": "When a request to the Airflow core API carries both a session cookie and an explicit `Authorization: Bearer` token, Airflow resolves the caller from the cookie and ignores the bearer token, inverting the intended precedence of bearer over cookie. The request then executes -- and is recorded in the audit log -- as the cookie\u0027s principal rather than the identity the client explicitly presented.\n\nOnly Apache Airflow 3.3.0 and 3.3.1 are affected. Earlier releases do not contain the code path that caches the cookie-derived user, and are not vulnerable.\n\nExploiting this requires an attacker to first place a valid session cookie of their own into the victim\u0027s browser or client: for example by cookie tossing from a sibling subdomain, through cross-site scripting in a separate application sharing a parent domain, or via a shared workstation. Deployments that host the Airflow UI on a domain shared with other applications are therefore the most exposed; a deployment on a dedicated domain with no co-hosted applications is not reachable this way. The consequence is principal confusion and misattributed audit records rather than a direct privilege escalation.\n\nUsers of 3.3.0 or 3.3.1 should upgrade to Apache Airflow 3.3.2 or later, which resolves the caller from the explicitly supplied credential whenever one is present.",
  "id": "GHSA-9x6g-jfj6-r3jg",
  "modified": "2026-09-21T15:32:05Z",
  "published": "2026-09-21T15:32:05Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-82355"
    },
    {
      "type": "WEB",
      "url": "https://github.com/apache/airflow/pull/72225"
    },
    {
      "type": "WEB",
      "url": "https://github.com/apache/airflow/pull/72723"
    },
    {
      "type": "WEB",
      "url": "https://lists.apache.org/thread/3p7zpdvv40tn01m0xk5mt2rxg88mw8w1"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

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Action not permitted

CVE-2026-82355 (GCVE-0-2026-82355)

FKIE_CVE-2026-82355

GHSA-9X6G-JFJ6-R3JG

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