CVE-2026-24902: TrustTunnel has SSRF and private network restriction bypass via numeric address destinations

Vulnerability summary

CVE-2026-24902 is a high (CVSS 7.1) Server-Side Request Forgery vulnerability in adguard trusttunnel. EPSS estimates a 0.27% chance of exploitation in the next 30 days, higher than 18.9% of scored vulnerabilities. 1 public exploit is recorded.

Timeline

1. 29-01-2026
   PublishedVulnerability first disclosed.
2. 29-01-2026
   Last modifiedVulnerability information updated.

Description

TrustTunnel is an open-source VPN protocol with a server-side request forgery and and private network restriction bypass in versions prior to 0.9.114. In `tcp_forwarder.rs`, SSRF protection for `allow_private_network_connections = false` was only applied in the `TcpDestination::HostName(peer)` path. The `TcpDestination::Address(peer) => peer` path proceeded to `TcpStream::connect()` without equivalent checks (for example `is_global_ip`, `is_loopback`), allowing loopback/private targets to be reached by supplying a numeric IP. The vulnerability is fixed in version 0.9.114.

• CWE-918Server-Side Request ForgeryThe web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination.