---
title: "CVE-2026-23552: Apache Camel: KeycloakSecurityPolicy does not validate issuer of JWT tokens against configured realm"
url: https://erroneo.us/security/cve/CVE-2026-23552/
description: "CVE-2026-23552 (org.apache.camel:camel-keycloak (Maven)): Cross-Realm Token Acceptance Bypass in KeycloakSecurityPolicy Apache Camel Keycloak component. The…"
type: vulnerability-record
section: "Security Digest"
date_published: 2026-02-23
date_modified: 2026-02-25
publisher: erroneo.us
author: erroneo.us Security Desk
cve: "CVE-2026-23552"
kev: false
cvss: 9.1
epss: 0.00607
license: All rights reserved. Quote with attribution and a link.
---

# CVE-2026-23552: Apache Camel: KeycloakSecurityPolicy does not validate issuer of JWT tokens against configured realm

**Signal:** Critical and remotely reachable. No known exploitation yet, but it is network-reachable without credentials. (Computed from CISA KEV, EPSS and CVSS; not an editorial verdict.)

## Should you act?

- Not in CISA KEV , but CISA’s SSVC assessment records a public proof-of-concept, so attack code exists.
- EPSS 0.6% , percentile 48: FIRST’s model estimates a 0.6% chance of exploitation activity in the next 30 days, higher than 48% of all scored CVEs (low). EPSS is a probability, not a verdict.
- Remotely reachable with no login and no user interaction. If the vulnerable service is exposed to the internet, prioritize it.
- Only applies if your dependency tree includes org.apache.camel:camel-keycloak (Maven) >= 4.15.0, < 4.18.0, fixed in 4.18.0 . Check your lockfile, including transitive dependencies.

## What it is

Cross-Realm Token Acceptance Bypass in KeycloakSecurityPolicy Apache Camel Keycloak component. The Camel-Keycloak KeycloakSecurityPolicy does not validate the iss (issuer) claim of JWT tokens against the configured realm. A token issued by one Keycloak realm is silently accepted by a policy configured for a completely different realm, breaking tenant isolation. This issue affects Apache Camel: from 4.15.0 before 4.18.0. Users are recommended to upgrade to version 4.18.0, which fixes the issue.

## Affected packages

- Maven `org.apache.camel:camel-keycloak` >= 4.15.0, < 4.18.0 → fixed: 4.18.0

## Affected products (CVE record)

- Apache Software Foundation Apache Camel: 4.15.0 < 4.18.0

## Severity

- CISA-ADP CVSS 3.1: 9.1 `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N`
- GitHub CVSS 3.1: 9.1 `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N`

## Exploitation

- CISA KEV: not listed (no confirmed in-the-wild exploitation known to CISA).
- CISA SSVC assessment: exploitation poc , automatable yes , technical impact partial .
- FIRST EPSS (model of 2026-10-21): 0.61% probability of exploitation activity in the next 30 days; percentile 48.

## Sources

- [camel.apache.org](https://camel.apache.org/security/CVE-2026-23552.html)
- [GitHub Advisory GHSA-c3f3-cc42-xr9v](https://github.com/advisories/GHSA-c3f3-cc42-xr9v)
- [CVE.org record CVE-2026-23552](https://www.cve.org/CVERecord?id=CVE-2026-23552)
- [NVD entry CVE-2026-23552](https://nvd.nist.gov/vuln/detail/CVE-2026-23552)
- [github.com](https://github.com/oscerd/CVE-2026-23552)
- [openwall.com](http://www.openwall.com/lists/oss-security/2026/02/18/7)
- [github.com](https://github.com/apache/camel/commit/c1ed776e3a4fa23d15acf4b9a48fdf758d4316ff)
- [issues.apache.org](https://issues.apache.org/jira/browse/CAMEL-22854)

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Source page: https://erroneo.us/security/cve/CVE-2026-23552/ · Security Digest: https://erroneo.us/security/ · More: https://erroneo.us/llms.txt