CVE-2026-44394Public exploitNetwork attack vector

Indefinite federated access via fresh token lifetimes

Published May 28, 2026 · Updated May 28, 2026

Incorrect authorization in affected OpenStack Keystone releases allows remote authenticated users to retain federated access indefinitely. During POST /v3/auth/tokens, handle_scoped_token() omits the original expires_at value, causing the provider to assign each rescoped token a fresh default lifetime. A federated SAML2 or OpenID Connect account is required; affected versions are 14.0.0 through 27.0.1, 28.0.0 through 28.0.1, and 29.0.0 through 29.0.1.

CVSS severity6.0
Medium
EPSS probability0.25%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Incorrect authorization in affected OpenStack Keystone releases allows remote authenticated users to retain federated access indefinitely. During POST /v3/auth/tokens, handle_scoped_token() omits the original expires_at value, causing the provider to assign each rescoped token a fresh default lifetime. A federated SAML2 or OpenID Connect account is required; affected versions are 14.0.0 through 27.0.1, 28.0.0 through 28.0.1, and 29.0.0 through 29.0.1.

The record

CVE
CVE-2026-44394
Published
May 28, 2026
Updated
May 28, 2026
Vendor
OpenStack
Product
Keystone
Classifications
CWE-863, T1078
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. May 28, 2026CVE publishedPublication date reported by the CVE source.
  2. May 28, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=14.0.0 <27.0.2
  2. Affected versionversion=28.0.0 <28.0.2
  3. Affected versionversion=29.0.0 <29.0.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

OpenStack · Keystoneversion=14.0.0 <27.0.2; version=28.0.0 <28.0.2; version=29.0.0 <29.0.2

Published CVSS scores

6.0MITRECVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:L/A:L
8.1NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-863Incorrect Authorization
T1078Valid Accounts

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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