CVE-2026-48891: Apache airflow Apache Airflow Exposes Unreadable DAG Vulnerability

MODERATE
Advisory Identifier: GHSA-3322-mjxh-9mp5
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CVSS 4.3
CWE-200
Published
Advisory Summary

CVE-2026-48891 is a MODERATE (CVSS 4.3) apache airflow exposes unreadable dag vulnerability (CWE-200: Exposure of Sensitive Information to an Unauthorized Actor) affecting Apache airflow libraries in the PyPI ecosystem. The issue involves apache airflow exposes unreadable dag identifiers in the scheduling dependencies graph. Remediation is available by upgrading affected packages to version 3.3.0.

CVE-2026-48891 at a Glance

CVE Identifier CVE-2026-48891
GHSA Identifier GHSA-3322-mjxh-9mp5
Severity MODERATE
CVSS v3.1 Base Score 4.3
CWE Classification CWE-200: Exposure of Sensitive Information to an Unauthorized Actor
Affected Product Apache airflow
Package Ecosystem PyPI
Published Date
Last Updated

Security Impact

CVSS: 4.3

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

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

How to Fix CVE-2026-48891

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: 3.3.0 
pip install apache-airflow>=3.3.0
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-2026-48891, 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 3.3.0), 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-200: Exposure of Sensitive Information to an Unauthorized Actor, where the product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. 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

A bug in Apache Airflow's `/ui/dependencies` scheduling graph endpoint applied the caller's readable-Dag filter to the top-level serialized Dag key but still emitted referenced Dag IDs through the `dep.source` and `dep.target` fields of trigger / sensor dependency entries. An authenticated UI user with read permission on some Dags could enumerate the identifiers of other Dags they were not authorized to read by inspecting the dependency graph for trigger / sensor references. Affects deployments that rely on per-Dag read scoping to keep Dag identifiers private across teams. This is a residual gap in the fix for CVE-2026-28563, which filtered the top-level Dag key but did not propagate the filter into the trigger / sensor dep-source / dep-target fields. Users who already upgraded for CVE-2026-28563 should additionally upgrade to `apache-airflow` 3.3.0 or later to cover the residual trigger / sensor dependency leak.

CVE-2026-48891 Affected Apache airflow Versions

1 component(s)
Fixed Versions:
3.3.0
Product / Package Ecosystem Affected Versions Fixed Version
apache-airflow
pypi/apache-airflow
PyPI
< 3.3.0
3.3.0

References

NVD — CVE-2026-48891 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-48891
Apache airflow Source Repository REPOSITORY
https://github.com/apache/airflow/pull/67627
Security Fix Commit FIX COMMIT
https://github.com/apache/airflow/commit/e61c9bac30a7b1a7f68589629f10c4cb247c683e
Apache airflow Source Repository REPOSITORY
https://github.com/apache/airflow
Apache airflow Source Repository REPOSITORY
https://github.com/pypa/advisory-database/tree/main/vulns/apache-airflow/PYSEC-2026-2086.yaml
lists.apache.org/thread/wzc8nflg94rq... WEB
https://lists.apache.org/thread/wzc8nflg94rq6w8f5tvtlo0o3g4wjrfl
CVE Official Record — CVE-2026-48891 CVE
https://www.cve.org/CVERecord?id=CVE-2026-28563

Frequently Asked Questions

What is CVE-2026-48891?
CVE-2026-48891 is a security vulnerability in Apache airflow involving Apache Airflow exposes unreadable DAG identifiers in the scheduling dependencies graph under CWE-200: Exposure of Sensitive Information to an Unauthorized Actor.
Which Apache airflow versions are affected?
Affected versions include releases prior to 3.3.0 across affected packages: apache-airflow.
What version fixes CVE-2026-48891?
Upgrading to 3.3.0 (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 3.3.0. Upgrade your dependency to 3.3.0 or later.
What is the CVSS score of CVE-2026-48891?
CVE-2026-48891 has a CVSS v3.1 base score of 4.3 (MODERATE) with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N.
What CWE is associated with CVE-2026-48891?
CVE-2026-48891 is classified under CWE-200: Exposure of Sensitive Information to an Unauthorized Actor (The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information.).
How can I check PyPI dependencies for CVE-2026-48891?
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-3322-mjxh-9mp5",
  "modified" : "2026-09-04T19:24:07Z",
  "published" : "2026-07-07T12:31:35Z",
  "aliases" : [ "CVE-2026-48891" ],
  "summary" : "Apache Airflow exposes unreadable DAG identifiers in the scheduling dependencies graph",
  "details" : "A bug in Apache Airflow's `/ui/dependencies` scheduling graph endpoint applied the caller's readable-Dag filter to the top-level serialized Dag key but still emitted referenced Dag IDs through the `dep.source` and `dep.target` fields of trigger / sensor dependency entries. An authenticated UI user with read permission on some Dags could enumerate the identifiers of other Dags they were not authorized to read by inspecting the dependency graph for trigger / sensor references. Affects deployments that rely on per-Dag read scoping to keep Dag identifiers private across teams. This is a residual gap in the fix for CVE-2026-28563, which filtered the top-level Dag key but did not propagate the filter into the trigger / sensor dep-source / dep-target fields. Users who already upgraded for CVE-2026-28563 should additionally upgrade to `apache-airflow` 3.3.0 or later to cover the residual trigger / sensor dependency leak.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "PyPI",
      "name" : "apache-airflow"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "3.3.0"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-48891"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/apache/airflow/pull/67627"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/apache/airflow/commit/e61c9bac30a7b1a7f68589629f10c4cb247c683e"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/apache/airflow"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/pypa/advisory-database/tree/main/vulns/apache-airflow/PYSEC-2026-2086.yaml"
  }, {
    "type" : "WEB",
    "url" : "https://lists.apache.org/thread/wzc8nflg94rq6w8f5tvtlo0o3g4wjrfl"
  }, {
    "type" : "WEB",
    "url" : "https://www.cve.org/CVERecord?id=CVE-2026-28563"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-200" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-09-04T19:24:07Z",
    "nvd_published_at" : "2026-07-07T10:16:41Z"
  }
}