CVE-2026-32253 | THREATINT

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.

PUBLISHED Reserved 2026-03-11 | Published 2026-05-22 | Updated 2026-05-26 | Assigner GitHub_M

CRITICAL: 9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Problem types

CWE-287: Improper Authentication

CWE-295: Improper Certificate Validation

Product status

< 2026.516.143833

affected

References

github.com/...nshine/security/advisories/GHSA-ph75-mgxh-mv57 exploit

github.com/...nshine/security/advisories/GHSA-ph75-mgxh-mv57

github.com/LizardByte/Sunshine/releases/tag/v2026.516.143833

cve.org (CVE-2026-32253)

nvd.nist.gov (CVE-2026-32253)

Download JSON