CVE-2026-44394
OpenStack Keystone Infinite Token Lifetime Vulnerability
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.
INFO
Published Date :
May 28, 2026, 7:16 p.m.
Last Modified :
June 2, 2026, 2:21 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | MEDIUM | 8254265b-2729-46b6-b9e3-3dfca2d5bfca | ||||
| CVSS 3.1 | MEDIUM | [email protected] | ||||
| CVSS 3.1 | HIGH | [email protected] |
Solution
- Update OpenStack Keystone to version 29.0.2 or later.
- Apply vendor patches if updating is not immediately possible.
- Review and enforce token lifetime policies for federated users.
Public PoC/Exploit Available at Github
CVE-2026-44394 has a 1 public
PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-44394.
| URL | Resource |
|---|---|
| https://bugs.launchpad.net/keystone/+bug/2150379 | Exploit Third Party Advisory Issue Tracking Patch |
| https://security.openstack.org/ossa/OSSA-2026-015.html | Vendor Advisory Patch |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-44394 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-44394
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
DSA and DLA for Debian last 14 days
Python
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-44394 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-44394 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
Jun. 02, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N Added CPE Configuration OR *cpe:2.3:a:openstack:keystone:*:*:*:*:*:*:*:* versions from (including) 28.0.0 up to (excluding) 28.0.2 *cpe:2.3:a:openstack:keystone:*:*:*:*:*:*:*:* versions from (including) 29.0.0 up to (excluding) 29.0.2 *cpe:2.3:a:openstack:keystone:*:*:*:*:*:*:*:* versions from (including) 14.0.0 up to (excluding) 27.0.2 Added Reference Type MITRE: https://bugs.launchpad.net/keystone/+bug/2150379 Types: Exploit, Issue Tracking, Patch, Third Party Advisory Added Reference Type MITRE: https://security.openstack.org/ossa/OSSA-2026-015.html Types: Patch, Vendor Advisory -
New CVE Received by [email protected]
May. 28, 2026
Action Type Old Value New Value Added 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. Added CVSS V3.1 AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:L/A:L Added CWE CWE-863 Added Reference https://bugs.launchpad.net/keystone/+bug/2150379 Added Reference https://security.openstack.org/ossa/OSSA-2026-015.html