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
9.8EG
EchelonGraph verdictPatch nowTreat as an emergency — this is being exploited.
  • Actively exploited in the wild (CISA-KEV)
CISA-KEV: ExploitedEPSS PROB: 100%CVSS: 9.8Exploit: cisa kev · ssvc active · Metasploit · epss top5pct · epss high · public exploitExposed services: Not assessed

A fix is available — apply it.

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
9.8CRITICALhigh confidence
EG Risk
99
EG Risk 99/100CISA SSVC

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity98% × 45%
Exploitation100% × 40%
Automatability100% × 15%
CISA SSVC: Attend at low mission impact; Act at medium or high.
Action: A fix is available. Apply it sooner than your standard update timelines at low mission impact and as soon as possible at medium or high.
EPSS PROB
100%
EPSS %ILE
99th
KEV
⚠ Exploited

CISA SSVCAttend at low mission impact; Act at medium or high.

A fix is available. Apply it sooner than your standard update timelines at low mission impact and as soon as possible at medium or high.

Exploitation active (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

November 10, 2020

Last Modified

October 23, 2025

Advisory Details (4)

Auto-updated Oct 9, 2026
⚠️ Active exploitation confirmed. Patch available. Sources: cisa.
cisa🔴 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

Pony Mail

https://lists.apache.org/thread.html/r23a81b247aa346ff193670be565b2b8ea4b17ddbc7a35fc099c1aadd%40%3Cdev.airflow.apache.org%3E
generic

Packet Storm

http://packetstormsecurity.com/files/174764/Apache-Airflow-1.10.10-Remote-Code-Execution.html
generic

Packet Storm

http://packetstormsecurity.com/files/162908/Apache-Airflow-1.10.10-Remote-Code-Execution.html

Affected Packages

(1 across 1 ecosystem)
PyPI(1)
PackageVulnerable rangeFix by version rangeDependents
apache-airflow1.8.1 ... 1.10.11rc2 (46 versions)
  • every version up to 1.10.11: fixed in 1.10.11
—

Weakness Classification(3)

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

Data Freshness Timeline

(refreshed 6× in last 7d / 34× 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.

Showing the most recent 100 of 111 total refreshes for this CVE.

  1. 2026-10-09 23:26 UTCEG score recompute
  2. 2026-10-09 20:03 UTCEPSS rescore
  3. 2026-10-08 02:21 UTCEG score recompute
  4. 2026-10-07 23:43 UTCEPSS rescore
  5. 2026-10-04 23:23 UTCEG score recompute
  6. 2026-10-04 23:18 UTCEPSS rescore
  7. 2026-09-29 00:34 UTCEG score recompute
  8. 2026-09-27 21:51 UTCCISA KEV update
  9. 2026-09-25 19:35 UTCCISA KEV update
  10. 2026-09-25 14:55 UTCCISA KEV update
  11. 2026-09-24 19:31 UTCCISA KEV update
  12. 2026-09-24 15:26 UTCEG score recompute
  13. 2026-09-24 13:59 UTCEPSS rescore
  14. 2026-09-23 16:57 UTCEG score recompute
  15. 2026-09-22 19:36 UTCCISA KEV update
  16. 2026-09-22 18:27 UTCEG score recompute
  17. 2026-09-22 14:43 UTCEPSS rescore
  18. 2026-09-21 23:42 UTCEG score recompute
  19. 2026-09-21 20:28 UTCEPSS rescore
  20. 2026-09-21 19:09 UTCCISA KEV update
  21. 2026-09-19 19:09 UTCEG score recompute
  22. 2026-09-19 15:37 UTCEPSS rescore
  23. 2026-09-18 19:20 UTCCISA KEV update
  24. 2026-09-18 14:15 UTCCISA KEV update
  25. 2026-09-17 22:08 UTCEG score recompute
Show 75 more
  1. 2026-09-17 19:22 UTCEPSS rescore
  2. 2026-09-16 16:08 UTCEG score recompute
  3. 2026-09-16 14:10 UTCCISA KEV update
  4. 2026-09-16 14:04 UTCEPSS rescore
  5. 2026-09-16 14:04 UTCEPSS rescore
  6. 2026-09-16 08:39 UTCEG score recompute
  7. 2026-09-14 19:24 UTCCISA KEV update
  8. 2026-09-11 18:49 UTCCISA KEV update
  9. 2026-09-10 19:28 UTCCISA KEV update
  10. 2026-09-09 19:08 UTCCISA KEV update
  11. 2026-09-08 18:54 UTCCISA KEV update
  12. 2026-09-04 17:38 UTCCISA KEV update
  13. 2026-09-02 17:33 UTCCISA KEV update
  14. 2026-08-31 14:19 UTCCISA KEV update
  15. 2026-08-29 00:55 UTCEG score recompute
  16. 2026-08-28 21:37 UTCEPSS rescore
  17. 2026-08-27 17:22 UTCCISA KEV update
  18. 2026-08-26 17:41 UTCCISA KEV update
  19. 2026-08-24 18:52 UTCCISA KEV update
  20. 2026-08-24 15:37 UTCEG score recompute
  21. 2026-08-24 11:53 UTCEG score recompute
  22. 2026-08-21 16:49 UTCCISA KEV update
  23. 2026-08-20 17:06 UTCCISA KEV update
  24. 2026-08-19 17:33 UTCCISA KEV update
  25. 2026-08-18 16:58 UTCCISA KEV update
  26. 2026-08-17 13:56 UTCCISA KEV update
  27. 2026-08-12 14:51 UTCEG score recompute
  28. 2026-08-12 13:47 UTCEPSS rescore
  29. 2026-08-11 19:32 UTCCISA KEV update
  30. 2026-08-11 16:21 UTCEG score recompute
  31. 2026-08-07 17:09 UTCCISA KEV update
  32. 2026-08-05 17:25 UTCCISA KEV update
  33. 2026-08-04 17:02 UTCCISA KEV update
  34. 2026-08-03 19:22 UTCCISA KEV update
  35. 2026-07-30 11:49 UTCEG score recompute
  36. 2026-07-29 19:27 UTCCISA KEV update
  37. 2026-07-28 18:28 UTCEG score recompute
  38. 2026-07-28 15:32 UTCEPSS rescore
  39. 2026-07-27 19:24 UTCCISA KEV update
  40. 2026-07-27 17:17 UTCCISA KEV update
  41. 2026-07-26 13:40 UTCEG score recompute
  42. 2026-07-23 01:49 UTCEG score recompute
  43. 2026-07-22 22:34 UTCEG score recompute
  44. 2026-07-22 19:40 UTCCISA KEV update
  45. 2026-07-21 14:37 UTCCISA KEV update
  46. 2026-07-17 10:07 UTCEG score recompute
  47. 2026-07-16 17:04 UTCCISA KEV update
  48. 2026-07-15 16:49 UTCCISA KEV update
  49. 2026-07-15 15:04 UTCCISA KEV update
  50. 2026-07-14 18:05 UTCCISA KEV update
  51. 2026-07-13 17:07 UTCCISA KEV update
  52. 2026-07-12 05:44 UTCEPSS rescore
  53. 2026-07-10 17:52 UTCCISA KEV update
  54. 2026-07-09 19:06 UTCEPSS rescore
  55. 2026-07-08 15:11 UTCEPSS rescore
  56. 2026-07-07 19:01 UTCCISA KEV update
  57. 2026-07-07 17:16 UTCCISA KEV update
  58. 2026-07-01 19:16 UTCCISA KEV update
  59. 2026-06-29 19:12 UTCCISA KEV update
  60. 2026-06-25 19:15 UTCCISA KEV update
  61. 2026-06-23 17:44 UTCCISA KEV update
  62. 2026-06-18 16:13 UTCCISA KEV update
  63. 2026-06-17 17:50 UTCEPSS rescore
  64. 2026-06-17 17:50 UTCEPSS rescore
  65. 2026-06-16 19:33 UTCCISA KEV update
  66. 2026-06-15 19:33 UTCCISA KEV update
  67. 2026-06-15 17:46 UTCEPSS rescore
  68. 2026-06-12 23:09 UTCEPSS rescore
  69. 2026-06-12 17:35 UTCCISA KEV update
  70. 2026-06-11 19:10 UTCCISA KEV update
  71. 2026-06-09 18:42 UTCCISA KEV update
  72. 2026-06-09 17:12 UTCCISA KEV update
  73. 2026-06-08 19:16 UTCCISA KEV update
  74. 2026-06-08 17:26 UTCCISA KEV update
  75. 2026-06-05 22:43 UTCCISA KEV update

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.

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

    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 product + 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 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 attention. A fix is available. Apply it.
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 affected packages EchelonGraph has on record, with version ranges, are listed in the Affected Packages section of this page.
How do I remediate CVE-2020-13927?
A fix for CVE-2020-13927 is available: update to the fixed version the vendor names in its advisory.

Dependency Blast Radius

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