Reference page — cumulative record through Thursday, October 8, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2026-86843

CVE-2026-86843MEDIUM

Apache Airflow Teradata provider: SQL injection via unvalidated Dag Params in the compute-cluster example Dag

  AV  AC  PR  UI  S  C  I  A   CVSS    EPSS   %ile   KEV
   N   L   L   N  U  L  L  L    6.3   .0039   31.2     —

AFFECTED
  Product                           Versions     Fixed
  Apache Airflow Teradata provider  unspecified  —

TIMELINE
  Sep 8   Reserved by apache
  Sep 29  Published (CNA: apache)
  Oct 7   EXPLOIT PUBLISHED — CVE-2026-86843 (Apache Software Foundation Apache Airflow Teradata provider). Public exploit reference added.

CWE-89 · CNA: apache · CVSS v3.1 · 3 references · NVD status: Analyzed

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.

Lifecycle

Complete event history — 3 events, chronological
Date	Event	Detail
September 8, 2026	Reserved	Reserved by apache
September 29, 2026	Published	Published (CNA: apache)
October 7, 2026	EXPLOIT PUBLISHED	EXPLOIT PUBLISHED — CVE-2026-86843 (Apache Software Foundation Apache Airflow Teradata provider). Public exploit reference added.

Affected

Affected products and packages — 1 row
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
Apache Software Foundation	Apache Airflow Teradata provider	—	—	—

Weaknesses

CWE-89

References (3)

http://www.openwall.com/lists/oss-security/2026/09/29/14 [Mitigation, Third Party Advisory]
https://github.com/apache/airflow/pull/72714 [Exploit, Patch]
https://lists.apache.org/thread/js9pmhj1j6552gpn1j8wdz579pb46t0d [Mailing List, Vendor Advisory]

Authoritative record: CVE-2026-86843 at cve.org

Vendors: apache

Weaknesses: CWE-89

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-86843 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Thursday, October 8, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.