# CVE-2026-32253

## Summary

- **CVE ID:** CVE-2026-32253
- **Severity:** CRITICAL
- **CVSS Score:** 9.8 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)
- **CWE:** CWE-287, CWE-295
- **Published:** May 22, 2026
- **Last Modified:** May 26, 2026

## 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.

## Affected Products

- LizardByte — Sunshine (< 2026.516.143833)

## References

- [CNA](https://github.com/LizardByte/Sunshine/security/advisories/GHSA-ph75-mgxh-mv57)
- [CNA](https://github.com/LizardByte/Sunshine/releases/tag/v2026.516.143833)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.29%
- **EPSS Percentile:** 21.8

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-18._