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Vulnerabilities

Vulnerability · CVE-2020-17526

Incorrect Session Validation in Apache Airflow Webserver versions prior to 1.10.14 with default config allows a malicious airflow user on site A where they log in norm…

Published Dec 21, 2020 · catalog updated Jun 17, 2026 · the affected product

Last checked Nov 2, 2026. A connected source was read within the last 7 days.

Check this week

CVE-2020-17526 is not in CISA KEV. FIRST estimates a 23.86% chance of exploitation in the next 30 days. Check whether you run the affected product.

Gaps on this record

  • No plain product name is stored. The page cannot tell you which product to check.
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.

Same product and reporting

Severity
High7.7
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
23.86%
Remediation
Version ranges on file
Affected products
cpe apache/airflow

Incorrect Session Validation in Apache Airflow Webserver versions prior to 1.10.14 with default config allows a malicious airflow user on site A where they log in normally, to access unauthorized Airflow Webserver on Site B through the session from Site A. This does not affect users who have changed the default value for config.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • cpe apache/airflow< 1.10.14

How to fix CVE-2020-17526

  • Upgrade

    CVE-2020-17526 lists a fix boundary at 1.10.14. Compare the installed build with that boundary before you change production.

  • Version check

    Affected < 1.10.14

  • Advisory

    Open the inventory_high record and follow its fix.

  • Official advisories

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

CVE-2020-17526 is not in CISA KEV. FIRST estimates a 23.86% chance of exploitation in the next 30 days. Check whether you run the affected product.

Which versions are affected?

Compare what you have installed with < 1.10.14. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 23.86%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Technology hubs

Apache Airflow security

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Dec 21, 2020 · Monitored products — high

    Detected

    Incorrect Session Validation in Apache Airflow Webserver versions prior to 1.10.14 with default config allows a malicious airflow user on site A where they log in normally, to access unauthorized Airflow Webserver on Site B through the session from Site A. This does not affect users who have changed the default value for config.

  2. Jun 17, 2026 · Monitored products — high

    Updated

    Incorrect Session Validation in Apache Airflow Webserver versions prior to 1.10.14 with default config allows a malicious airflow user on site A where they log in normally, to access unauthorized Airflow Webserver on Site B through the session from Site A. This does not affect users who have changed the default value for config.

Sources

  • Monitored products — highVendor advisoryCVE-2020-17526

    Incorrect Session Validation in Apache Airflow Webserver versions prior to 1.10.14 with default config allows a malicious airflow user on site A where they log in normally, to access unauthorized Airflow Webserver on Site B through the session from Site A. This does not affect users who have changed the default value for config.

    nvd.nist.gov

References

Freshness

Last verified in this catalog Nov 2, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • Monitored products — highNov 2, 2026