---
id: CVE-2026-100848
title: >-
  AzuraCast (Composer package azuracast/azuracast) before 0.23.8 validates a
  station's "Remote Relay" URL only for URL syntax and an http/https scheme
  (Utilities\Urls::parseUserUrl, used by StationRemote::getUrlAsUri) and
  performs no host …
summary: >-
  AzuraCast (Composer package azuracast/azuracast) before 0.23.8 validates a
  station's "Remote Relay" URL only for URL syntax and an http/https scheme
  (Utilities\Urls::parseUserUrl, used by StationRemote::getUrlAsUri) and
  performs no host …
severity: high
cvss: 7.1
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N'
cwe:
  - CWE-918
vendor: AzuraCast
product: AzuraCast
affected:
  - AzuraCast < 0.23.8
published: '2026-09-27'
updated: '2026-09-27'
sourceUpdated: '2026-09-27T02:17:23.583'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-100848'
references:
  - url: >-
      https://github.com/AzuraCast/AzuraCast/security/advisories/GHSA-4h6m-rrxm-7w3m
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/azuracast-before-0.23.8-server-side-request-forgery-via-remote-relay-url
    label: disclosure@vulncheck.com
tags:
  - nvd
  - cve.org
ingestedAt: '2026-09-27T02:41:45.576Z'
---

## Overview

AzuraCast (Composer package azuracast/azuracast) before 0.23.8 validates a station's "Remote Relay" URL only for URL syntax and an http/https scheme (Utilities\Urls::parseUserUrl, used by StationRemote::getUrlAsUri) and performs no host or IP address restriction. A user holding only the station-scoped RemoteRelays permission can therefore set a Remote Relay URL pointing at loopback, private-network, or cloud-metadata addresses (e.g. http://127.0.0.1:<port>/ or http://169.254.169.254/latest/meta-data/), and AzuraCast's periodic background Now Playing sync (AbstractRemote::getNowPlayingAsync) will automatically and repeatedly issue HTTP requests to that address, resulting in server-side request forgery against internal resources. This affects the main branch as of commit bcf8754eef3a268ad82c3db4d81f7920c3c28b56 (2026-07-31); no patched version is available at the time of the advisory.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.