CVE-2026-32253 Details
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.
A vulnerability in LizardByte Sunshine prior to version 2026.516.143833 allows for client-certificate authentication to be bypassed. This issue arises from the way OpenSSL verification results are processed. The custom verification callback incorrectly treats certain certificate errors as successful, enabling untrusted certificates to authenticate and access protected HTTPS endpoints. As a result, unauthorized users could gain access to Sunshine APIs meant for paired clients, potentially leading to unauthorized control over streaming sessions.
Users are advised to update to Sunshine version 2026.516.143833 or later, where this vulnerability has been fixed.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed May 26, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/LizardByte/Sunshine/security/advisories/GHSA-ph75-mgxh-mv57 | CISA-ADP | ExploitVendor Advisory |
| https://github.com/LizardByte/Sunshine/releases/tag/v2026.516.143833 | [email protected] | ProductRelease Notes |
| https://github.com/LizardByte/Sunshine/security/advisories/GHSA-ph75-mgxh-mv57 | [email protected] | ExploitVendor Advisory |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-287 | Improper Authentication | [email protected] |
| CWE-295 | Improper Certificate Validation | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| lizardbyte sunshine | < 2026.516.143833 |
CPE
Remediation
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Change History
6 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jul 23, 2026 | CVE Translated | [email protected] |
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| May 26, 2026 | Initial Analysis | [email protected] |
| May 26, 2026 | CVE Modified | CISA-ADP |
| May 22, 2026 | New CVE Received | [email protected] |