6.3
MEDIUM CVSS 3.1
CVE-2026-86843
Apache Airflow Teradata provider: SQL injection via unvalidated Dag Params in the compute-cluster example Dag
Description

The Apache Airflow Teradata provider's compute-cluster example Dag declared every one of its Dag Params as unconstrained free text and templated them straight into the compute-cluster operators, which interpolate those values into Teradata DDL. A user who is permitted to trigger that Dag - a lower-trust role than the Dag author, and one that needs no Teradata credentials of its own - could therefore supply SQL fragments that execute under the connection the task runs as, and could additionally redirect the task at any other connection defined in the deployment, because the connection id was itself a free-text Param. Only deployments that run this example Dag, or a Dag copied from it, are affected; the provider's operator code is unchanged. Users of apache-airflow-providers-teradata are recommended to upgrade to version 3.7.0 or later, whose example constrains the Params to validated identifiers and a closed value set and removes connection selection and free-form option strings from trigger-time input. Upgrading does not change a Dag already copied from the example; users who copied it should apply the same constraints to their copy.

INFO

Published Date :

Sept. 29, 2026, 10:17 a.m.

Last Modified :

Oct. 7, 2026, 7:56 p.m.

Remotely Exploit :

Yes !
Affected Products

The following products are affected by CVE-2026-86843 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Apache apache-airflow-providers-teradata
CVSS Scores
The Common Vulnerability Scoring System is a standardized framework for assessing the severity of vulnerabilities in software and systems. We collect and displays CVSS scores from various sources for each CVE.
Score Version Severity Vector Exploitability Score Impact Score Source
CVSS 134c704f-9b21-4f2e-91b3-4a467353bcc0
CVSS 3.1 MEDIUM 134c704f-9b21-4f2e-91b3-4a467353bcc0
Solution
Upgrade Apache Airflow Teradata provider to 3.7.0+ or apply constraints to copied example Dags.
  • Upgrade apache-airflow-providers-teradata to version 3.7.0 or later.
  • If using a copied example Dag, apply similar constraints to its Params.
  • Constrain Dag Params to validated identifiers and closed value sets.
  • Remove connection selection from trigger-time input.
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2026-86843.

URL Resource
https://github.com/apache/airflow/pull/72714 Exploit Patch
https://lists.apache.org/thread/js9pmhj1j6552gpn1j8wdz579pb46t0d Mailing List Vendor Advisory
http://www.openwall.com/lists/oss-security/2026/09/29/14 Mitigation Third Party Advisory
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-86843 is associated with the following CWEs:

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2026-86843 vulnerability anywhere in the article.

The following table lists the changes that have been made to the CVE-2026-86843 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • Initial Analysis by [email protected]

    Oct. 07, 2026

    Action Type Old Value New Value
    Added CPE Configuration OR *cpe:2.3:a:apache:apache-airflow-providers-teradata:*:*:*:*:*:*:*:* versions up to (excluding) 3.7.0
    Added Reference Type Apache Software Foundation: https://github.com/apache/airflow/pull/72714 Types: Exploit, Patch
    Added Reference Type CVE: http://www.openwall.com/lists/oss-security/2026/09/29/14 Types: Mitigation, Third Party Advisory
    Added Reference Type Apache Software Foundation: https://lists.apache.org/thread/js9pmhj1j6552gpn1j8wdz579pb46t0d Types: Mailing List, Vendor Advisory
  • CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0

    Sep. 29, 2026

    Action Type Old Value New Value
    Added CVSS V3.1 AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
    Added SSVC {'id': 'CVE-2026-86843', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'no'}, {'technicalImpact': 'partial'}], 'version': '2.0.3', 'timestamp': '2026-09-29T18:28:33.365841Z'}
  • CVE Modified by af854a3a-2127-422b-91ae-364da2661108

    Sep. 29, 2026

    Action Type Old Value New Value
    Added Reference http://www.openwall.com/lists/oss-security/2026/09/29/14
  • New CVE Received by [email protected]

    Sep. 29, 2026

    Action Type Old Value New Value
    Added Description The Apache Airflow Teradata provider's compute-cluster example Dag declared every one of its Dag Params as unconstrained free text and templated them straight into the compute-cluster operators, which interpolate those values into Teradata DDL. A user who is permitted to trigger that Dag - a lower-trust role than the Dag author, and one that needs no Teradata credentials of its own - could therefore supply SQL fragments that execute under the connection the task runs as, and could additionally redirect the task at any other connection defined in the deployment, because the connection id was itself a free-text Param. Only deployments that run this example Dag, or a Dag copied from it, are affected; the provider's operator code is unchanged. Users of apache-airflow-providers-teradata are recommended to upgrade to version 3.7.0 or later, whose example constrains the Params to validated identifiers and a closed value set and removes connection selection and free-form option strings from trigger-time input. Upgrading does not change a Dag already copied from the example; users who copied it should apply the same constraints to their copy.
    Added CWE CWE-89
    Added Affected New affected value received. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/86xxx/CVE-2026-86843.json">CVE-2026-86843</a>
    Added Reference https://github.com/apache/airflow/pull/72714
    Added Reference https://lists.apache.org/thread/js9pmhj1j6552gpn1j8wdz579pb46t0d
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.