CVE-2026-31987: Apache Airflow JWT Token Appearing Vulnerability

MODERATE
Advisory Identifier: GHSA-phv5-vq5p-qhp7
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CVSS 7.5
CWE-532
Published
Advisory Summary

CVE-2026-31987 is a MODERATE (CVSS 7.5) jwt token appearing vulnerability (CWE-532: Insertion of Sensitive Information into Log File) affecting Apache Airflow libraries in the PyPI ecosystem. The issue involves jwt token appearing in logs. Remediation is available by upgrading affected packages to version 3.2.0.

CVE-2026-31987 at a Glance

CVE Identifier CVE-2026-31987
GHSA Identifier GHSA-phv5-vq5p-qhp7
Severity MODERATE
CVSS v3.1 Base Score 7.5
CWE Classification CWE-532: Insertion of Sensitive Information into Log File
Affected Product Apache Airflow
Package Ecosystem PyPI
Published Date
Last Updated

Security Impact

CVSS: 7.5

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required None (PR:N)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality High (C:H)
Integrity None (I:N)
Availability None (A:N)

How to Fix CVE-2026-31987

To remediate this vulnerability, upgrade all affected Apache Airflow dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

apache-airflow fixed: 3.2.0 
pip install apache-airflow>=3.2.0
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

pip show apache-airflow

How to Check if You Are Affected

To determine whether your Python environment is affected by CVE-2026-31987, inspect your installed packages using pip:

pip show apache-airflow

Analyze the terminal output to locate any version of Apache Airflow in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 3.2.0), your application is affected.

Note: The pip show apache-airflow command checks currently installed packages in your active Python environment.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-532: Insertion of Sensitive Information into Log File, where the product writes sensitive information to a log file. In Apache Airflow, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

JWT Tokens used by tasks were exposed in logs. This could allow UI users to act as Dag Authors. Users are advised to upgrade to Airflow version that contains fix. Users are recommended to upgrade to version 3.2.0, which fixes this issue.

CVE-2026-31987 Affected Apache Airflow Versions

1 component(s)
Fixed Versions:
3.2.0
Product / Package Ecosystem Affected Versions Fixed Version
apache-airflow
pypi/apache-airflow
PyPI
≥ 3.0.0
< 3.2.0
3.2.0

References

NVD — CVE-2026-31987 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-31987
Apache Airflow Source Repository REPOSITORY
https://github.com/apache/airflow/issues/62428
Apache Airflow Source Repository REPOSITORY
https://github.com/apache/airflow/issues/62773
Apache Airflow Source Repository REPOSITORY
https://github.com/apache/airflow/pull/62964
Apache Airflow Source Repository REPOSITORY
https://github.com/apache/airflow
lists.apache.org/thread/pvsrtxzwo9xy... WEB
https://lists.apache.org/thread/pvsrtxzwo9xy6xgknmwslv4zrw70kt6g
Apache Airflow Security Information SECURITY
http://www.openwall.com/lists/oss-security/2026/04/16/7

Frequently Asked Questions

What is CVE-2026-31987?
CVE-2026-31987 is a security vulnerability in Apache Airflow involving JWT token appearing in logs under CWE-532: Insertion of Sensitive Information into Log File.
Which Apache Airflow versions are affected?
Affected versions include releases prior to 3.2.0 across affected packages: apache-airflow.
What version fixes CVE-2026-31987?
Upgrading to 3.2.0 (or the latest patched release for your respective branch) resolves the vulnerability.
Is apache-airflow affected?
Yes, apache-airflow is affected in releases prior to 3.2.0. Upgrade your dependency to 3.2.0 or later.
What is the CVSS score of CVE-2026-31987?
CVE-2026-31987 has a CVSS v3.1 base score of 7.5 (MODERATE) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.
What CWE is associated with CVE-2026-31987?
CVE-2026-31987 is classified under CWE-532: Insertion of Sensitive Information into Log File (The product writes sensitive information to a log file.).
How can I check PyPI dependencies for CVE-2026-31987?
Run the dependency tree command: 'pip show apache-airflow'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-phv5-vq5p-qhp7",
  "modified" : "2026-04-24T20:52:30Z",
  "published" : "2026-04-16T15:31:32Z",
  "aliases" : [ "CVE-2026-31987" ],
  "summary" : "Apache Airflow: JWT token appearing in logs",
  "details" : "JWT Tokens used by tasks were exposed in logs. This could allow UI users to act as Dag Authors. \nUsers are advised to upgrade to Airflow version that contains fix.\n\nUsers are recommended to upgrade to version 3.2.0, which fixes this issue.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N"
  }, {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "PyPI",
      "name" : "apache-airflow"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "3.0.0"
      }, {
        "fixed" : "3.2.0"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-31987"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/apache/airflow/issues/62428"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/apache/airflow/issues/62773"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/apache/airflow/pull/62964"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/apache/airflow"
  }, {
    "type" : "WEB",
    "url" : "https://lists.apache.org/thread/pvsrtxzwo9xy6xgknmwslv4zrw70kt6g"
  }, {
    "type" : "WEB",
    "url" : "http://www.openwall.com/lists/oss-security/2026/04/16/7"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-532" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-04-16T22:57:42Z",
    "nvd_published_at" : "2026-04-16T14:16:13Z"
  }
}