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TI-2026-33209 Aliases CVE-2026-45426GHSA-x5wm-j6wh-2834

Apache Airflow: Log server JWT authorization bypass via Python lstrip() character stripping allows cross-Dag log access

Priority LOW 15CWE-863Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
High
Impact type
Security bypass
Confidentiality · integrity · availability
Low · None · None
Fix status
Fixed

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA and GitHub. Impact type from CWE-863.

Summary

Exploitation requires the attacker to already be an authenticated Airflow worker holding a valid Log-server JWT issued for at least one Dag. Apache Airflow's Log server authorized JWT tokens against Dag IDs by applying Python's `str.lstrip()` to the requested path segment when verifying the JWT's `sub` claim. `str.lstrip()` strips any of a *set* of characters from the left (not a prefix), so a JWT issued for a Dag named e.g. `dag_a` would authorize log access to any other Dag whose name began with any subset of the characters `{d, a, g, _}` (e.g. `dag_attacker`, `aaaa_target`, `_dag_secret`). Such an authenticated worker could enumerate and read worker logs of other Dags whose names happened to share that character-class prefix, leaking task output and error traces beyond the documented per-Dag isolation boundary. Affects deployments relying on per-Dag log-access scoping (multi-team, shared-executor, shared-worker topologies). Users are advised to upgrade to `apache-airflow` 3.2.2 or later.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00358 29th percentileScored 2026-11-07
Fix Fixed Apache Airflow (Apache Software Foundation): 3.2.2apache-airflow (PyPI): 3.2.2

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
ApacheApache Airflow3.0.0 to before 3.2.23.2.2Patch availableCNA
—apache-airflow (PyPI)3.0.0 to before 3.2.23.2.2Patch availableGHSA-x5wm-j6wh-2834
  • Apache Airflow VendorApache Affected 3.0.0 to before 3.2.2 Fixed in 3.2.2 Patch available CNA
  • apache-airflow (PyPI) Vendor— Affected 3.0.0 to before 3.2.2 Fixed in 3.2.2 Patch available GHSA-x5wm-j6wh-2834

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:apache:airflow:*:*:*:*:*:*:*:*3.0.0 to before 3.2.2VulnerableApache
  • cpe:2.3:a:apache:airflow:*:*:*:*:*:*:*:* Versions 3.0.0 to before 3.2.2 Vulnerable ·Apache

Remediation

  • Fix · CNA Apache Airflow (Apache Software Foundation) Fixed in 3.2.2
  • Fix · GHSA-x5wm-j6wh-2834 apache-airflow (PyPI) Fixed in 3.2.2 Advisory →

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    Apache Airflow 3.2.2

    17 records Highest priority Priority MEDIUM 3 MEDIUM, 14 LOW

    Other records, highest priority first

    • TI-2026-30568 Apache Airflow: BashOperator Jinja2 injection via dag_run.conf — low-privilege user patternPriority MEDIUM 47
    • TI-2026-36484 Apache Airflow: JWT Token Exposure in KubernetesExecutor Command-Line ArgumentsPriority MEDIUM 41
    • TI-2026-30661 Apache Airflow: Authenticated RCE via XCom PATCH endpoint — XComUpdateBody missing FORBIDDEN_XCOM_KEYS validatorPriority MEDIUM 41
    Show all 17 records →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-45426
  2. 2026-10-03 Alias added: GHSA-x5wm-j6wh-2834
  3. 2026-11-03 Fix available: [email protected] · CNA

References

Patch 1

Advisory 3

Other 2

  • TI-2020-10905 Missing authentication in Apache Airflow KEVCVSS 3.1CRITICAL 9.8
  • TI-2020-09638 OS command injection in Apache Airflow KEVCVSS 3.1HIGH 8.8
  • TI-2022-19017 Apache Airflow <2.4.0 has an RCE in a bash example CVSS 3.1HIGH 8.8
  • TI-2021-16140 Apache Airflow: Variable Import endpoint missed authentication check CVSS 3.1CRITICAL 9.8
  • TI-2022-08169 Apache Airflow: RCE in example DAGs CVSS 3.1HIGH 8.8
  • TI-2024-26776 Apache Airflow: DAG Author Code Execution possibility in airflow-scheduler CVSS 3.1HIGH 8.8
See all 157 →

Sources

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