CVE-2026-44394 OpenStack Keystone's federated token rescoping mechanism doesn't propagate the original token's expiry to the newly issued token
Federated users can bypass token expiration policies by repeatedly rescoping tokens, maintaining indefinite access in OpenStack Keystone deployments using federated identity.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-44394?
CVE-2026-44394 is a medium-severity vulnerability in OpenStack Keystone, published on 28 May 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
An issue was discovered in OpenStack Keystone before 29.0.2. The Keystone federated token rescoping mechanism does not propagate the original token's expiry to the newly issued token. When a federated user rescopes a token via POST /v3/auth/tokens, the handle_scoped_token() function in the mapped authentication plugin returns response data without an expires_at value. The token provider falls back to issuing a token with a fresh default TTL. By rescoping repeatedly before each token expires, a user can maintain access indefinitely, bypassing operator-configured token lifetime policies. This is a variant of CVE-2012-3426. Only deployments using federated identity (SAML2, OpenID Connect) are affected.
Weakness: CWE-863
Which versions are affected by CVE-2026-44394?
7 open source packages ship an affected version, including keystone. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
keystone PyPI | From 14.0.0 | 27.0.2, 28.0.2, 29.0.2 |
keystone PyPI | From 14.0.0 | 27.0.2 |
keystone PyPI | From 14.0.0 | 27.0.2 |
keystone PyPI | From 28.0.0 | 28.0.2 |
keystone PyPI | From 28.0.0 | 28.0.2 |
keystone PyPI | From 29.0.0 | 29.0.2 |
1 more packages
keystone PyPI | From 29.0.0 | 29.0.2 |
Products include Openstack Keystone.
How do I fix CVE-2026-44394?
Upgrade keystone to a fixed version for your release line: 27.0.2, 28.0.2 or 29.0.2.
Is CVE-2026-44394 being exploited?
There is no known exploitation of CVE-2026-44394 in the wild and no public exploit code.
Other vulnerabilities in OpenStack Keystone
- CVE-2020-12690 Insufficient Session Expiration in OpenStack Keystone
- CVE-2019-19687 OpenStack Keystone Credential Leakage
- CVE-2026-43001 OpenStack Keystone has an Incorrect Authorization Issue
- CVE-2014-2828 OpenStack Identity (Keystone) DoS through V3 API authentication chaining
- CVE-2021-38155 OpenStack Keystone allows information disclosure during account locking
Sources
Also known as DEBIAN-CVE-2026-44394, GHSA-whqr-fgm5-x77q, PYSEC-2026-603.