# CVE-2026-97636 — Apache Airflow HashiCorp provider

> As of 2026-09-25, CVE-2026-97636 is a MEDIUM-severity vulnerability in Apache Airflow HashiCorp provider, CVSS v3.1 6.5, EPSS 0.3% (28.8th percentile). No Threadlinqs-tracked threat campaign has been attributed to CVE-2026-97636 as of 2026-09-25; the identifier is re-checked against the Threadlinqs threat corpus on every daily ingest.

**Last updated:** 2026-09-25

## What is CVE-2026-97636?

Apache Airflow HashiCorp provider: the HashiCorp Vault secrets backend's team-scope guard can be bypassed with a user-controlled key. In a multi-team deployment, a Dag author scoped to one team can supply a Variable key containing a path separator that causes the backend to resolve a secret belonging to a different team, because after the team-scoped lookup misses the backend falls back to a team-agnostic path concatenated from the unvalidated key. The Execution API Variables route accepts a path-shaped key, so this is reachable from ordinary Dag code. Affects multi-team deployments using the HashiCorp Vault secrets backend. Single-team deployments are not affected, as there is no cross-team boundary to cross. This is the same class as CVE-2026-86465, CVE-2026-68870, CVE-2026-68871 and CVE-2026-68872 in the Akeyless, Azure Key Vault, Yandex Lockbox and Amazon secrets backends. Users of apache-airflow-providers-hashicorp are recommended to upgrade to version 4.8.0 or later, which fixes the issue.

The record classifies CVE-2026-97636 under weakness class [CWE-639](https://intel.threadlinqs.com/cwe/CWE-639). Its CVSS v3 base vector states that the flaw is reachable remotely over the network, needs low-privilege credentials, needs no user interaction, and has high impact on confidentiality. 1 affected-product entry is recorded, across 1 vendor, listed below. The identifier was first published 11 days ago.

## Severity and exploitation probability

- **CVSS v3.1 base score:** 6.5 — MEDIUM (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N`)
- **EPSS (FIRST):** 0.3% probability of exploitation in the next 30 days, higher than 28.8% of all scored CVEs
- **CISA KEV:** Not listed in the CISA Known Exploited Vulnerabilities catalog
- **Threadlinqs priority:** 4.4/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
- **Published:** 2026-09-24, last modified 2026-09-25

## Is CVE-2026-97636 being exploited?

It currently carries a trending score of 36 in the Threadlinqs vulnerability feed.

## Affected products and versions

- [Apache Software Foundation](https://intel.threadlinqs.com/vendors/apache-software-foundation): Apache Airflow HashiCorp provider

## How to fix CVE-2026-97636

No vendor patch reference has been recorded for CVE-2026-97636 in the tracked sources. Follow the references below for a fix, and treat the products listed above as exposed until the vendor states otherwise.

## Threat activity tracking CVE-2026-97636

No threat campaign in the Threadlinqs corpus currently references CVE-2026-97636, in its CVE list or as an indicator. The linkage is recomputed from the live corpus on every daily ingest, so this section fills in as soon as a tracked campaign cites the identifier.

## Sources

Enriched from CVE.org, FIRST EPSS, NVD. Last verified by Threadlinqs on 2026-09-30. This product uses the NVD API but is not endorsed or certified by the NVD.

**Vendor advisory and patch**

- [github.com — patch](https://github.com/apache/airflow/pull/70006)
- [lists.apache.org — vendor advisory](https://lists.apache.org/thread/l0fogo9dh5v07vnsxnhoh3c74othkr51)

**Other references**

- [cve.org — related](https://www.cve.org/CVERecord?id=CVE-2026-68870)
- [cve.org — related (CVERecord)](https://www.cve.org/CVERecord?id=CVE-2026-68871)
- [cve.org — related (CVERecord)](https://www.cve.org/CVERecord?id=CVE-2026-68872)
- [cve.org — related (CVERecord)](https://www.cve.org/CVERecord?id=CVE-2026-86465)

Canonical: https://intel.threadlinqs.com/cve/CVE-2026-97636
Full detection coverage and IOCs for threats exploiting CVE-2026-97636 via the Threadlinqs MCP server (Purple tier): https://intel.threadlinqs.com/mcp