PatchSiren

PatchSiren cyber security CVE debrief

CVE-2026-46389 defenseunicorns CVE debrief

CVE-2026-46389 is a CRITICAL vulnerability in UDS Identity Config's Keycloak configuration image. 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. This allows an attacker who can reach the Keycloak token endpoint and knows a `client_id` using this authenticator to 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. The issue was patched in version 0.26.1.

Vendor
defenseunicorns
Product
uds-identity-config
CVSS
CRITICAL 10
CISA KEV
Not listed in stored evidence
Original CVE published
2026-06-05
Original CVE updated
2026-06-15
Advisory published
2026-06-05
Advisory updated
2026-06-15

Who should care

Users of UDS Identity Config versions 0.11.0 through 0.26.0 should be aware of this vulnerability and take action to patch their systems.

Technical summary

A logic error in the `client-kubernetes-secret` Keycloak client authenticator causes the submitted `client_secret` to be overwritten with the mounted Kubernetes secret before comparison. This allows an attacker to authenticate as a client with any `client_secret` value and obtain OAuth2 tokens scoped to the client's service account.

Defensive priority

CRITICAL

Recommended defensive actions

  • Upgrade to version 0.26.1 or later to patch the issue.
  • Restrict access to the Keycloak token endpoint to prevent unauthorized access.

Evidence notes

The CVE-2026-46389 vulnerability was patched in version 0.26.1. References: [ref-4](https://github.com/defenseunicorns/uds-identity-config/releases/tag/v0.26.1), [ref-5](https://github.com/defenseunicorns/uds-identity-config/security/advisories/GHSA-8mg2-6588-r4hw).

Sources and references

Verified primary and authoritative sources

  • CVE-2026-46389 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-46389

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-46389 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-46389

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.