# Keycloak vulnerable to authorization bypass via the Admin API

Advisory record · `GHSA-r8jr-wg88-fq5c`

- **Identifiers:** `GHSA-r8jr-wg88-fq5c` · `BIT-keycloak-2026-2366` · `CVE-2026-2366`
- **State:** Confirmed
- **Severity:** CVSS 3.1 Low
- **Critical:** No
- **Weakness (CWE):** [CWE-639](https://cwe.mitre.org/data/definitions/639.html)
- **Tags:** [Broken access control](https://agentprime.io/advisories/tag/access-control.md)
- **Published:** 12 Mar 2026
- **Updated:** 26 Aug 2026
- **Reviewed by a person:** No

Published by the GitHub Advisory Database at 12 Mar 2026, 12:30 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

## Affected packages

- `@keycloak/keycloak-admin-client` (npm): affected `<=26.5.5`; no fixed version yet
- `org.keycloak:keycloak-js-admin-client` (Maven): affected `<=26.5.5`; no fixed version yet

## Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

## Severity and exploitation

- 3.1 Low, CVSS 3.1: `CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N`, from CNA (redhat)

- **CISA KEV:** Not listed.
- **EPSS:** 0.0030, the 22nd percentile, on 11 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

## Timeline

This record came from the full history of the GitHub Advisory Database, published 12 Mar 2026. New records show when each source confirmed them.

## Sources

- [GitHub Advisory Database: GHSA-r8jr-wg88-fq5c](https://github.com/advisories/GHSA-r8jr-wg88-fq5c)
- [OSV: GHSA-r8jr-wg88-fq5c](https://osv.dev/vulnerability/GHSA-r8jr-wg88-fq5c)
- <https://nvd.nist.gov/vuln/detail/CVE-2026-2366>
- <https://github.com/keycloak/keycloak/issues/47062>
- <https://access.redhat.com/errata/RHSA-2026:6477>
- <https://access.redhat.com/errata/RHSA-2026:6478>
- <https://access.redhat.com/security/cve/CVE-2026-2366>
- <https://bugzilla.redhat.com/show_bug.cgi?id=2439081>
- <https://github.com/keycloak/keycloak>

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.

## Check whether this affects you

A Match means an installed version is in the affected range above. Most don’t affect the app; agentprime hasn’t analysed this one yet.

- With the agentprime MCP server (<https://api.agentprime.io/mcp>), ask your agent to check the project: `check_lockfile` sends a lockfile, `check_packages` a list of installed packages, and both return the Matches and the upgrades that clear them. `get_advisory` returns this record. Setup: <https://agentprime.io/mcp.md>
- In a browser: <https://agentprime.io/check/> reads your lockfile in the browser, never uploading it.
- Whether it touches your code, with file and line: the Claude Code plugin, <https://agentprime.io/plugin.md>
- As JSON: <https://api.agentprime.io/v1/advisories/GHSA-r8jr-wg88-fq5c>, or `POST https://api.agentprime.io/v1/match` with your packages (<https://agentprime.io/api.md>)

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The web page: <https://agentprime.io/advisories/GHSA-r8jr-wg88-fq5c/>. Everything for agents: <https://agentprime.io/llms.txt>.