---
id: "CVE-2026-115642"
kind: "vulnerability"
aliases: ["CVE-2026-115642"]
title: "OpenStack keystonemiddleware: forged service token header bypasses application credential restrictions"
severity: "high"
cvss: 8.3
epss: null
exploited: false
status: "open"
category: "package"
products: []
ecosystems: []
tags: ["keystone", "openstack", "package", "self-hosted"]
not_affected_if: ["keystonemiddleware-13.0.2-or-later", "no-restricted-application-credentials"]
published_at: "2026-10-30T17:17:15+00:00"
first_seen_at: "2026-10-30T17:31:39+00:00"
updated_at: "2026-10-30T17:32:01+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-115642", "first_seen_at": "2026-10-30T17:31:39+00:00"}]
---

# OpenStack keystonemiddleware: forged service token header bypasses application credential restrictions

keystonemiddleware, the OpenStack authentication middleware, trusts a custom X-Service-Token header supplied by the request. An attacker holding a restricted application credential can use that header to skip the credential's limits and gain higher privileges.

_Summary, check and fix written by a model from the sources; labelled as such._

## How to check

- Check the installed keystonemiddleware version with `pip show keystonemiddleware` on each OpenStack service host.
- Check whether any application credentials are restricted with access rules in Keystone.

## Fix

- keystonemiddleware: move to `13.0.2` or later.

## Timeline

- 2026-10-30T17:31:39+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-115642

## From the sources

In OpenStack keystonemiddleware before 13.0.2, by supplying a custom X-Service-Token header in a request, anyone in possession of an access-restricted application credential may bypass those restrictions resulting in elevation of privileges.

---

_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_