CVE-2026-0871: Keycloak Server Private SPI: Improper Access Control Allows Administrators to Bypass Attribute Visibility Restrictions…

CVE-2026-0871 · Severity: low · CVSS 3.1 · Published 2026-02-27

Keycloak Server Private SPI: Improper Access Control Allows Administrators to Bypass Attribute Visibility Restrictions and Modify Unmanaged User Profile Attributes

Technologies: org.keycloak:keycloak-server-spi-private (Maven). Vendors: Maven.

Quick answers

Is CVE-2026-0871 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-0871 being exploited in the wild.
How severe is CVE-2026-0871?
Low severity, with a CVSS score of 3.1, published 27 February 2026.
Which products and versions are affected?
org.keycloak:keycloak-server-spi-private (Maven) ECOSYSTEM:introduced=0,fixed=26.5.2.
Is there a fix for CVE-2026-0871?
Yes. org.keycloak:keycloak-server-spi-private (Maven): upgrade to 26.5.2 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
Am I affected by CVE-2026-0871?
Check whether you run org.keycloak:keycloak-server-spi-private (Maven) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

  • org.keycloak:keycloak-server-spi-private (Maven): upgrade to 26.5.2 or later
    # set org.keycloak:keycloak-server-spi-private to 26.5.2 in your pom.xml or build.gradle

Affected products

  • org.keycloak:keycloak-server-spi-private (Maven) ECOSYSTEM:introduced=0,fixed=26.5.2

Identifiers

  • CVE-2026-0871
  • GHSA-v4jw-m6rm-399h

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