CVE-2020-13927

CRITICALNVD 9.89.8—
EchelonGraph scoreHIGH confidence

Score elevated to 9.8 because this CVE is listed on the CISA Known Exploited Vulnerabilities catalog (added 2022-01-18), indicating real-world exploitation has been confirmed by US federal agencies. NVD baseline CVSS 9.8 retained for reference. Confidence: HIGH.

Triggered by: CISA KEV (actively exploited)
Sources: cisa_kev, epss, nvd
Exploited in the wild
9.8
EchelonGraph verdictPatch nowTreat as an emergency — this is being exploited.
  • Actively exploited in the wild (CISA-KEV)
CISA-KEV: ExploitedEPSS: 100%CVSS: 9.8Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

The previous default setting for Airflow's Experimental API was to allow all API requests without authentication, but this poses security risks to users who miss this fact. From Airflow 1.10.11 the default has been changed to deny all requests by default and is documented at https://airflow.apache.org/docs/1.10.11/security.html#api-authentication. Note this change fixes it for new installs but existing users need to change their config to default [api]auth_backend = airflow.api.auth.backend.deny_all as mentioned in the Updating Guide: https://github.com/apache/airflow/blob/1.10.11/UPDATING.md#experimental-api-will-deny-all-request-by-default

CVSS v3
9.8
EG Score
9.8(high)
EPSS
99.9%
KEV
⚠ Exploited

Published

November 10, 2020

Last Modified

October 23, 2025

Advisory Details (2)

Auto-updated Jun 1, 2026
⚠️ Active exploitation confirmed. Patch available. Sources: cisa.
cisa Patch Available🔴 Active Exploitation

Known Exploited Vulnerabilities Catalog | CISA

Known Exploited Vulnerabilities Catalog | CISA. Listed in CISA Known Exploited Vulnerabilities catalog.

https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-13927
generic
https://lists.apache.org/thread.html/r23a81b247aa346ff193670be565b2b8ea4b17ddbc7a35fc099c1aadd%40%3Cdev.airflow.apache.org%3E

Affected Packages

(1 across 1 ecosystem)
PyPI(1)
PackageVulnerable rangeFixed inDependents
apache-airflow1.8.1 ... 1.10.11rc2 (46 versions)1.10.11—

Weakness Classification(3)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 4× in last 7d / 18× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-07-22 19:40 UTCCISA KEV update
  2. 2026-07-21 14:37 UTCCISA KEV update
  3. 2026-07-17 10:07 UTCEG score recompute
  4. 2026-07-16 17:04 UTCCISA KEV update
  5. 2026-07-15 16:49 UTCCISA KEV update
  6. 2026-07-15 15:04 UTCCISA KEV update
  7. 2026-07-14 18:05 UTCCISA KEV update
  8. 2026-07-13 17:07 UTCCISA KEV update
  9. 2026-07-12 05:44 UTCEPSS rescore
  10. 2026-07-10 17:52 UTCCISA KEV update
  11. 2026-07-09 19:06 UTCEPSS rescore
  12. 2026-07-08 15:11 UTCEPSS rescore
  13. 2026-07-07 19:01 UTCCISA KEV update
  14. 2026-07-07 17:16 UTCCISA KEV update
  15. 2026-07-01 19:16 UTCCISA KEV update
  16. 2026-06-29 19:12 UTCCISA KEV update
  17. 2026-06-25 19:15 UTCCISA KEV update
  18. 2026-06-23 17:44 UTCCISA KEV update
  19. 2026-06-18 16:13 UTCCISA KEV update
  20. 2026-06-17 17:50 UTCEPSS rescore
  21. 2026-06-17 17:50 UTCEPSS rescore
  22. 2026-06-16 19:33 UTCCISA KEV update
  23. 2026-06-15 19:33 UTCCISA KEV update
  24. 2026-06-15 17:46 UTCEPSS rescore
  25. 2026-06-12 23:09 UTCEPSS rescore
Show 18 more
  1. 2026-06-12 17:35 UTCCISA KEV update
  2. 2026-06-11 19:10 UTCCISA KEV update
  3. 2026-06-09 18:42 UTCCISA KEV update
  4. 2026-06-09 17:12 UTCCISA KEV update
  5. 2026-06-08 19:16 UTCCISA KEV update
  6. 2026-06-08 17:26 UTCCISA KEV update
  7. 2026-06-05 22:43 UTCCISA KEV update
  8. 2026-06-04 13:10 UTCEPSS rescore
  9. 2026-06-04 13:10 UTCEPSS rescore
  10. 2026-06-03 19:09 UTCCISA KEV update
  11. 2026-06-02 18:32 UTCCISA KEV update
  12. 2026-06-01 20:42 UTCCISA KEV update
  13. 2026-05-29 22:20 UTCCISA KEV update
  14. 2026-05-29 13:42 UTCEPSS rescore
  15. 2026-05-29 13:42 UTCEPSS rescore
  16. 2026-05-27 20:35 UTCCISA KEV update
  17. 2026-05-26 19:13 UTCCISA KEV update
  18. 2026-05-23 05:30 UTCEG score recompute

Publicly available exploits

(3 references)

Working exploit code is in the public domain (1 Metasploit module) (1 Exploit-DB entry). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • Exploit-DBEDB-49927
    First seen Jun 2, 2021

    Apache Airflow 1.10.10 - 'Example Dag' Remote Code Execution

    Open source ↗
  • Metasploitexploit/linux/http/apache_airflow_dag_rce✓ verified
    First seen Jul 14, 2020

    Apache Airflow 1.10.10 - Example DAG Remote Code Execution

    Open source ↗
  • Nucleihttp/cves/2020/CVE-2020-13927.yaml
    First seen Jan 1, 2020

    Airflow Experimental <1.10.11 - REST API Auth Bypass

    Open source ↗

Related CVEs(same CWE)

Frequently asked(6)

What is CVE-2020-13927?
CVE-2020-13927 is a critical vulnerability published on November 10, 2020. The previous default setting for Airflow's Experimental API was to allow all API requests without authentication, but this poses security risks to users who miss this fact. From Airflow 1.10.11 the default has been changed to deny all requests by default and is documented at…
When was CVE-2020-13927 disclosed?
CVE-2020-13927 was first published in the National Vulnerability Database on November 10, 2020, with the most recent update on October 23, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2020-13927 actively exploited?
Yes. CISA added CVE-2020-13927 to the Known Exploited Vulnerabilities catalog on January 18, 2022, affecting Apache Airflow's Experimental API. KEV listing indicates confirmed exploitation in the wild; this CVE warrants immediate patching attention.
What is the CVSS score of CVE-2020-13927?
CVE-2020-13927 has a CVSS v3 base score of 9.8 (NVD).
Which products are affected by CVE-2020-13927?
CVE-2020-13927 affects Apache Airflow's Experimental API. The full affected-products list, including version ranges and fixed versions, is shown in the Affected Packages section of this page.
How do I remediate CVE-2020-13927?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2020-13927, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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