# Keycloak fails to verify if an Identity Provider (IdP) is enabled before issuing tokens

Advisory record · `GHSA-37gf-gmxv-74wv`

- **Identifiers:** `GHSA-37gf-gmxv-74wv` · `CVE-2026-1486`
- **State:** Confirmed
- **Severity:** CVSS 8.8 High
- **Critical:** No
- **Weakness (CWE):** [CWE-358](https://cwe.mitre.org/data/definitions/358.html)
- **Tags:** [CWE-358](https://agentprime.io/advisories/tag/cwe-358.md)
- **Published:** 9 Feb 2026
- **Updated:** 13 Feb 2026
- **Reviewed by a person:** No

Published by the GitHub Advisory Database at 9 Feb 2026, 21:31 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

## Affected packages

- `org.keycloak:keycloak-services` (Maven): affected `>=26.5.0, <26.5.3 || <26.4.9`; fixed in `26.5.3`, `26.4.9`

## Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

> Keycloak (org.keycloak:keycloak-services, Maven) versions 26.5.0 up to but not including 26.5.3, and versions below 26.4.9, fail to check whether an Identity Provider is enabled in the jwt-authorization-grant flow. An attacker holding the signing key of a disabled IdP could present valid JWT assertions and obtain access tokens. Upgrade to version 26.5.3 or 26.4.9.

Written 3 Nov 2026.

## 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

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

- **CISA KEV:** Not listed.
- **EPSS:** 0.0049, the 42nd percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

## Timeline

- 31 Oct 2026, 14:21 UTC: First seen by agentprime
- 31 Oct 2026, 14:21 UTC: [Confirmed by OSV](https://osv.dev/vulnerability/GHSA-37gf-gmxv-74wv)

## Sources

- [GitHub Advisory Database: GHSA-37gf-gmxv-74wv](https://github.com/advisories/GHSA-37gf-gmxv-74wv)
- [OSV: GHSA-37gf-gmxv-74wv](https://osv.dev/vulnerability/GHSA-37gf-gmxv-74wv)
- <https://nvd.nist.gov/vuln/detail/CVE-2026-1486>
- <https://github.com/keycloak/keycloak/issues/46146>
- <https://github.com/keycloak/keycloak/pull/46148>
- <https://github.com/keycloak/keycloak/commit/176dc8902ce552056d3648c4601d519afc6fb043>
- <https://github.com/keycloak/keycloak/commit/8316e8538f0037d9f998181e73122cff93a94035>
- <https://access.redhat.com/errata/RHSA-2026:2365>
- <https://access.redhat.com/errata/RHSA-2026:2366>
- <https://access.redhat.com/security/cve/CVE-2026-1486>
- <https://bugzilla.redhat.com/show_bug.cgi?id=2433347>
- <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-37gf-gmxv-74wv>, 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-37gf-gmxv-74wv/>. Everything for agents: <https://agentprime.io/llms.txt>.