Vulnerability Description
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.
CVSS Score
CRITICAL
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Lizardbyte | Sunshine | < 2026.516.143833 |
Related Weaknesses (CWE)
References
- https://github.com/LizardByte/Sunshine/releases/tag/v2026.516.143833ProductRelease Notes
- https://github.com/LizardByte/Sunshine/security/advisories/GHSA-ph75-mgxh-mv57ExploitVendor Advisory
- https://github.com/LizardByte/Sunshine/security/advisories/GHSA-ph75-mgxh-mv57ExploitVendor Advisory
FAQ
What is CVE-2026-32253?
CVE-2026-32253 is a vulnerability with a CVSS score of 9.8 (CRITICAL). 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 ha...
How severe is CVE-2026-32253?
CVE-2026-32253 has been rated CRITICAL with a CVSS base score of 9.8/10. This is considered a critical vulnerability requiring immediate attention.
Is there a patch for CVE-2026-32253?
Check the references section above for vendor advisories and patch information. Affected products include: Lizardbyte Sunshine.