---
id: "CVE-2026-73099"
kind: "vulnerability"
aliases: ["CVE-2026-73099"]
title: "Apache Juneau: a crafted link replaces request bodies, bypassing CSRF protections"
severity: "critical"
cvss: 10.0
epss: null
exploited: false
status: "open"
category: "package"
products: []
ecosystems: []
tags: ["apache-juneau", "java", "package", "rest-api"]
not_affected_if: ["disablecontentparam-set", "juneau-after-9.2.1", "no-browser-clients"]
published_at: "2026-11-05T12:17:50+00:00"
first_seen_at: "2026-11-05T12:38:47+00:00"
updated_at: "2026-11-05T12:40:05+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-73099", "first_seen_at": "2026-11-05T12:38:47+00:00"}]
exploit_sources: []
---

# Apache Juneau: a crafted link replaces request bodies, bypassing CSRF protections

Apache Juneau's REST server accepts a "content" query parameter that replaces the request body, enabled by default on every HTTP method including GET. A cross-site link can therefore send an attacker-chosen body to an endpoint without a CORS preflight, defeating method- or content-type-based CSRF protection.

_Summary, check and fix written by a model from the sources; labelled as such._

## How to check

- Check the Juneau version in the project's build file against `9.2.0` and earlier.
- Search application config for `disableContentParam` to see whether it is set to `true`.

## Fix

- Apache Juneau: upgrade to `9.2.1`.
- Applications that do not use the content parameter can set `disableContentParam` to `true`.

## Timeline

- 2026-11-05T12:38:47+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-73099

## From the sources

Cross-Site Request Forgery (CSRF) vulnerability in Apache Juneau.

The REST server accepts a "content" query parameter that replaces the request body, and this is enabled by default on every HTTP method, including GET. A cross-site link can therefore deliver an attacker-chosen request body to an endpoint without a CORS preflight, defeating protections that rely on the HTTP method or content type instead of an anti-CSRF token.

This issue affects Apache Juneau: through 9.2.0.

Users are recommended to upgrade to version 9.2.1, which fixes the issue. Applications that do not use the content parameter can also set disableContentParam to true.

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