Vulnerability · Published Sep 27, 2026 · Assigned by VulnCheck
CVE-2026-100849AzuraCast before 0.23.8 SSRF Filter Bypass via Hostname and Private IPs
High 7.1
In plain English
A high-severity server-side request forgery in AzuraCast from AzuraCast. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 22% of all known vulnerabilities).
Official description
AzuraCast is a self-hosted web radio management suite. In AzuraCast before 0.23.8, the station webhook URL validation in AbstractConnector::getValidUrl() (backend/src/Webhook/Connector/AbstractConnector.php), used by the Generic and Discord webhook connectors, rejects only URLs whose host is a literal link-local IP address (169.254.0.0/16 or fe80::/10). Loopback addresses and RFC1918 private ranges are not rejected, and any non-literal-IP hostname causes the IP parsing call to throw, which skips the check entirely. A user holding only the station-scoped WebHooks permission can therefore configure a webhook pointing at an internal, loopback, or private-network target and cause the server to issue an outbound HTTP POST containing the station's Now Playing data, resulting in server-side request forgery. The PUT /station/{id}/webhook/{id}/test endpoint allows the same low-privileged user to trigger the request on demand. At the time of the advisory no patched version was available.
Affected products (as reported)
Weakness: CWE-918 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N
References
- GitHub Security Advisory (GHSA-3jp3-3wqw-jvw4) vendor-advisory
- VulnCheck Advisory: AzuraCast before 0.23.8 SSRF Filter Bypass via Hostname and Private IPs third-party-advisory