CVE-2026-111044 is an incorrect authorization vulnerability in LizardByte Sunshine, a self-hosted game stream host for Moonlight. Between versions 2026.329.165800 and 2026.906.222525, Sunshine accepted any client certificate chaining to a stored paired-client certificate without requiring the exact paired identity. This allowed a previously paired client to bypass the Disable control by presenting an alternate certificate derived from its paired certificate. The issue also involved inconsistent client identity handling due to non-canonicalized PEM encoding comparisons. The vulnerability does not affect clients that were never paired, and removing a paired client removes its trust relationship. The issue is fixed in version 2026.906.222525.
Sunshine is a self-hosted game stream host for Moonlight. In versions prior to 2026.516.143833, the client-certificate authentication can be bypassed because of how OpenSSL verification results are handled. In src/crypto.cpp, the custom verify callback treats X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT_LOCALLY, X509_V_ERR_CERT_NOT_YET_VALID, and X509_V_ERR_CERT_HAS_EXPIRED as success. This can allow an untrusted certificate to pass authentication and access protected HTTPS endpoints. This issue has been fixed in version 2026.516.143833.
Sunshine is a self-hosted game stream host for Moonlight. Prior to version 2025.923.33222, the Windows service SunshineService is installed with an unquoted executable path. If Sunshine is installed in a directory whose name includes a space, the Service Control Manager (SCM) interprets the path incrementally and may execute a malicious binary placed earlier in the search string. This issue has been patched in version 2025.923.33222.
A local privilege escalation vulnerability exists in Sunshine for Windows (version v2025.122.141614 and likely prior versions) due to an unquoted service path.
Sunshine for Windows, version v2025.122.141614, contains a DLL search-order hijacking vulnerability, allowing attackers to insert a malicious DLL in user-writeable PATH directories.
Sunshine is a self-hosted game stream host for Moonlight. Prior to version 2025.628.4510, the web UI of Sunshine lacks protection against Cross-Site Request Forgery (CSRF) attacks. This vulnerability allows an attacker to craft a malicious web page that, when visited by an authenticated user, can trigger unintended actions within the Sunshine application on behalf of that user. Specifically, since the application does OS command execution by design, this issue can be exploited to abuse the "Command Preparations" feature, enabling an attacker to inject arbitrary commands that will be executed with Administrator privileges when an application is launched. This issue has been patched in version 2025.628.4510.
Sunshine is a self-hosted game stream host for Moonlight. Prior to version 2025.628.4510, the web UI of Sunshine lacks protection against Clickjacking attacks. This vulnerability allows an attacker to embed the Sunshine interface within a malicious website using an invisible or disguised iframe. If a user is tricked into interacting (one or multiple clicks) with the malicious page while authenticated, they may unknowingly perform actions within the Sunshine application without their consent. This issue has been patched in version 2025.628.4510.