How severe is CVE-2026-44394?

CVE-2026-44394 has a CVSS 3.x base score of 6.0, rated medium severity. It is exploitable over network with high attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.

Is CVE-2026-44394 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (16th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-44394?

CVE-2026-44394 affects Openstack Keystone. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-44394?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-44394 have an EU (EUVD) identifier?

Yes. CVE-2026-44394 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-33243.

When was CVE-2026-44394 published?

CVE-2026-44394 was published on 2026-05-28 and last updated on 2026-06-17.

CVE-2026-44394

CVE-2026-44394 is a medium-severity vulnerability in Openstack Keystone with a CVSS 3.x base score of 6.0. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-863.

Key facts

Severity: Medium (CVSS 3.x base score 6.0)
EPSS exploit prediction: 0% (16th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-33243
Weakness: CWE-863
Affected product: Openstack Keystone
Published: 2026-05-28
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2026-44394?: 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.
How severe is CVE-2026-44394?: CVE-2026-44394 has a CVSS 3.x base score of 6.0, rated medium severity. It is exploitable over network with high attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.
Is CVE-2026-44394 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (16th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-44394?: CVE-2026-44394 affects Openstack Keystone. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-44394?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-44394 have an EU (EUVD) identifier?: Yes. CVE-2026-44394 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-33243.
When was CVE-2026-44394 published?: CVE-2026-44394 was published on 2026-05-28 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:openstack:keystone:*:*:*:*:*:*:*:*

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