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CVE-2026-40913

Apache Airflow: Import Errors API Leaks Unauthorized DAG Stack Traces via Incomplete Per-File RBAC Enforcement

Products / packages Apache Software Foundation Apache Airflow

Published

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Severity and exploitation

Not in CISA KEV

KEV coverage does not rule out exploitation.

KEV checked 14/11/2026, 23:55:31 UTC
CISA-ADP · CVSS:3.1 · 8.2
Assessment vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:L

Severity

high8.2

CVSS measures technical severity, not the likelihood of an attack.

Known exploitation

Not listed in the checked CISA KEV catalog

Absence from CISA KEV does not rule out attacks.

Public exploit

Not established by this record

Missing evidence does not mean no public exploit exists.

Remediation

Fix status not established

No structured fix or guidance is available here. Check the latest publisher advisory.

What this means

Apache Airflow's Import Errors API leaks unauthorized DAG stack traces to users with `ImportError.can_read` permission. This occurs when a file fails to parse before any DAG is defined or when its DAGs are removed. Users may expose file paths and code.

Summarized by @cf/meta/llama-3.3-70b-instruct-fp8-fast. Verify details against the original sources.

Attack conditions

No attack-condition excerpt has been identified here. Review the full source description and references for authentication, network access, and configuration requirements.

Review supporting sources →

Affected versions

Check the exact model, release, and any platform requirements against your installation.

Apache Software Foundation · apache

Apache Airflow

1 range
apache version evidence

Package identity

pkg:pypi/apache-airflow-coreExplore apache-airflow-core →

Identity supplied by apache. Version matching requires compatible range evidence.

Compare with this publisher’s ranges. This does not inspect your installation.

affected

0 → before 3.4.0

semver versions

unaffected

unknown

Other versions: unaffected

Automatic dependency matching is unavailable for this record. Use the product evidence and publisher’s instructions to check your installation.

What to do

Compare your installed product and version with the affected versions above. A matching product name alone does not confirm exposure.

No structured fix or remediation guidance is available here. Check the full source description and vendor’s latest advisory for a patch or workaround; do not assume another version is safe.

cve.new guidance unless attributed to a publisher. This page does not inspect your installation.

Public exploit evidence

No public exploit reference is identified in the imported evidence. This is not a claim that no exploit exists.

Original source description

Read the full publisher description

Apache Airflow's public Import Errors API returns the raw parse-failure stack trace to any user with the ImportError.can_read permission when the failing file has no registered DAG. This happens when a file fails to parse before any DAG is defined, or when all of its previously registered DAGs are removed but the parse error remains. Users who should not see that file's details can read stack traces that may expose file paths and code.

Users are advised to upgrade to Apache Airflow 3.4.0 or later, which restricts these stack traces to users with the new IMPORT_ERRORS_ALL permission.

References

3 sources
apache/airflow · pull request #69790
Patchapache
lists.apache.org/thread.html/t04l76dtx12m5cw8zfsnzo9r5rqnw0qv
Vendor advisoryapache
www.openwall.com/lists/oss-security/2026/11/09/3
Security advisoryCVE

Inside the record

Evidence available

Package identity
Version evidence
Remediation guidance · not supplied
Weakness classification
Additional publishers

Describes the evidence in this view, not whether the product is safe.

Original records

CVE-2026-40913

View the latest unmodified CVE JSON from the official source. It may be newer than this imported page.

cve.new JSON →

Underlying weaknesses

The source’s classification of what caused the vulnerability.

CWE-285 ↗

CWE-285: Improper Authorization

apache

Related →
Contributing organizations · 3
apache

Assigning organization

2026-11-09
CVE

Additional data publisher

2026-11-09
CISA-ADP

Additional data publisher

2026-11-12

Timeline

All times UTC

  1. Advisory published

    Publication date supplied by the source.

  2. Source updated

    Latest modification date supplied by the source.

  3. Last imported by cve.new

    Latest catalog import, not the date we first saw this advisory.

What changed

Follow changes
  1. CVE · CVE-2026-40913

    Observed 2026-11-12T21:53:43.637Z · upstream updated 2026-11-12T15:14:53.200Z

    Severity assessment changed

    before

    []

    after

    [
  {
    "source": "CISA-ADP",
    "vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:L",
    "score": 8.2
  }
]
    Prioritization updated

    before

    []

    after

    [
  {
    "source": "CISA-ADP",
    "type": "SSVC",
    "role": "CISA Coordinator",
    "timestamp": "2026-11-12T15:13:07.528387Z",
    "decisions": [
      {
        "name": "Exploitation",
        "value": "none"
      },
      {
        "name": "Automatable",
        "value": "yes"
      },
      {
        "name": "Technical Impact",
        "value": "partial"
      }
    ]
  }
]
  2. CVE · CVE-2026-40913

    Observed 2026-11-09T10:21:01.987Z · upstream updated 2026-11-09T10:12:08.062Z

    References changed

    before

    [
  "https://github.com/apache/airflow/pull/69790",
  "https://lists.apache.org/thread.html/t04l76dtx12m5cw8zfsnzo9r5rqnw0qv"
]

    after

    [
  "https://github.com/apache/airflow/pull/69790",
  "https://lists.apache.org/thread.html/t04l76dtx12m5cw8zfsnzo9r5rqnw0qv",
  "http://www.openwall.com/lists/oss-security/2026/11/09/3"
]

Large field values are marked as truncated previews. Original source snapshots remain retained.

Showing up to 50 most recent observed changes.