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CVE-2026-111395

Apache Airflow: Reserved serialization keys in Dag run conf crash the scheduler or are rebuilt as objects in the Triggerer via deadline callbacks

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 15/11/2026, 00:05:31 UTC
CISA-ADP · CVSS:3.1 · 8.2
Assessment vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H

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 versions before 3.4.0 are vulnerable to a deserialization weakness, where a user can trigger a Dag with a malicious conf, potentially crashing the scheduler or rebuilding objects in the Triggerer. The attacker needs access to trigger a Dag. The impact is a crash or object rebuilding.

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

3.2.0 → 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 did not reject reserved serialization keys inside a Dag run's conf. A user allowed to trigger a Dag that uses a deadline alert with an asynchronous callback could pass a conf that, once the deadline was missed, either crashed the scheduler repeatedly or was rebuilt into objects inside the Triggerer. Users are advised to upgrade to apache-airflow 3.4.0 or later.

References

3 sources
apache/airflow · pull request #74834
Patchapache
lists.apache.org/thread.html/qb4qxr40s0q6w9b9t5mfw5qf53pg97p3
Vendor advisoryapache
www.openwall.com/lists/oss-security/2026/11/09/13
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-2026-111395

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-502 ↗

CWE-502: Deserialization of Untrusted Data

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-2026-111395

    Observed 2026-11-12T21:53:46.870Z · upstream updated 2026-11-12T15:00:11.009Z

    Severity assessment changed

    before

    []

    after

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

    before

    []

    after

    [
  {
    "source": "CISA-ADP",
    "type": "SSVC",
    "role": "CISA Coordinator",
    "timestamp": "2026-11-12T15:00:06.238943Z",
    "decisions": [
      {
        "name": "Exploitation",
        "value": "none"
      },
      {
        "name": "Automatable",
        "value": "yes"
      },
      {
        "name": "Technical Impact",
        "value": "partial"
      }
    ]
  }
]
  2. CVE · CVE-2026-111395

    Observed 2026-11-09T10:21:36.183Z · upstream updated 2026-11-09T10:09:34.312Z

    References changed

    before

    [
  "https://github.com/apache/airflow/pull/74834",
  "https://lists.apache.org/thread.html/qb4qxr40s0q6w9b9t5mfw5qf53pg97p3"
]

    after

    [
  "https://github.com/apache/airflow/pull/74834",
  "https://lists.apache.org/thread.html/qb4qxr40s0q6w9b9t5mfw5qf53pg97p3",
  "http://www.openwall.com/lists/oss-security/2026/11/09/13"
]

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

Showing up to 50 most recent observed changes.