Know every vulnerabilitybefore it knows you.
DevGuard continuously monitors your dependencies and alerts you when CVEs like this one affect your stack — with real-time threat intelligence built for developers.
CVE-2026-24904
TrustTunnel is an open-source VPN protocol with a rule bypass issue in versions prior to 0.9.115. In tls_listener.rs, TlsListener::listen() peeks 1024 bytes and calls extract_client_random(...). If parse_tls_plaintext fails (for example, a fragmented/partial ClientHello split across TCP writes), extract_client_random returns None. In rules.rs, RulesEngine::evaluate only evaluates client_random_prefix when client_random is Some(...). As a result, when extraction fails (client_random == None), any rule that relies on client_random_prefix matching is skipped and evaluation falls through to later rules. As an important semantics note: client_random_prefix is a match condition only. It does not mean "block non-matching prefixes" by itself. A rule with client_random_prefix = ... triggers its action only when the prefix matches (and the field is available to evaluate). Non-matches (or None) simply do not match that rule and continue to fall through. The vulnerability is fixed in version 0.9.115.
The vulnerability can be exploited over the network without needing physical access. It is easy for an attacker to exploit this vulnerability. An attacker does not need any special privileges or access rights. No user interaction is needed for the attacker to exploit this vulnerability. The impact is confined to the system where the vulnerability exists. There is a low impact on the confidentiality of the information.
Exploitation attempts have been detected. Elevated vigilance and prompt remediation are advised.
The exploit probability is very low. The vulnerability is unlikely to be exploited in the next 30 days.
We did not find any exploit available. Neither in GitHub repositories nor in the Exploit-Database.
Browse More
Continuously monitor your dependencies and get alerted when vulnerabilities like this one affect your stack.
Checkout DevGuard