How severe is CVE-2026-46389?

CVE-2026-46389 has a CVSS 3.x base score of 10.0, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-46389 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (26th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-46389?

CVE-2026-46389 affects Defenseunicorns Uds Identity Config. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-46389?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

Does CVE-2026-46389 have an EU (EUVD) identifier?

Yes. CVE-2026-46389 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-34879.

When was CVE-2026-46389 published?

CVE-2026-46389 was published on 2026-06-05 and last updated on 2026-06-17.

CVE-2026-46389

CVE-2026-46389 is a critical-severity vulnerability in Defenseunicorns Uds Identity Config with a CVSS 3.x base score of 10.0. 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-287.

Key facts

Severity: Critical (CVSS 3.x base score 10.0)
EPSS exploit prediction: 0% (26th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-34879
Weakness: CWE-287
Affected product: Defenseunicorns Uds Identity Config
Published: 2026-06-05
Last modified: 2026-06-17

Description

UDS Identity Config builds the Keycloak configuration image (realm, plugins, theme, truststore, JARs) consumed by UDS Core's Identity deployment. In versions 0.11.0 through 0.26.0, a logic error in the `client-kubernetes-secret` Keycloak client authenticator (shipped by `uds-identity-config` and consumed by UDS Core) causes the submitted `client_secret` to be overwritten with the mounted Kubernetes secret before comparison. An attacker who can reach the Keycloak token endpoint and knows a `client_id` using this authenticator can authenticate as that client with any `client_secret` value and obtain OAuth2 tokens scoped to the client's service account. In the case of the `uds-operator` client this token can be used to registry/modify other clients. Version 0.26.1 patches the issue.

Frequently asked questions

What is CVE-2026-46389?: UDS Identity Config builds the Keycloak configuration image (realm, plugins, theme, truststore, JARs) consumed by UDS Core's Identity deployment. In versions 0.11.0 through 0.26.0, a logic error in the `client-kubernetes-secret` Keycloak client authenticator (shipped by `uds-identity-config` and consumed by UDS Core) causes the submitted `client_secret` to be overwritten with the mounted Kubernetes secret before comparison. An attacker who can reach the Keycloak token endpoint and knows a `client_id` using this authenticator can authenticate as that client with any `client_secret` value and obtain OAuth2 tokens scoped to the client's service account. In the case of the `uds-operator` client this token can be used to registry/modify other clients. Version 0.26.1 patches the issue.
How severe is CVE-2026-46389?: CVE-2026-46389 has a CVSS 3.x base score of 10.0, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-46389 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (26th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-46389?: CVE-2026-46389 affects Defenseunicorns Uds Identity Config. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-46389?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
Does CVE-2026-46389 have an EU (EUVD) identifier?: Yes. CVE-2026-46389 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-34879.
When was CVE-2026-46389 published?: CVE-2026-46389 was published on 2026-06-05 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:defenseunicorns:uds_identity_config:*:*:*:*:*:*:*:*

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