CVE-2026-32253

critical

Published 2026-05-22 · Modified 2026-05-26

CVSS v3

9.8

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

CVSS v2

—

VIR risk

9.8

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.

Predictions

Exploit likelihood

97%

Patch ETA

—

Heuristic predictions, AS-IS, for prioritization only.

Mitigations

vendor Authored 2026-05-27

Vendor advisory: security-advisories@github.com — https://github.com/LizardByte/Sunshine/security/advisories/GHSA-ph75-mgxh-mv57

vendor Authored 2026-05-27

Vendor advisory: security-advisories@github.com — https://github.com/LizardByte/Sunshine/releases/tag/v2026.516.143833

Application impact

Vendor	Product	Versions	Fixed
lizardbyte	sunshine	`{"endExcluding":"2026.516.143833"}`	`2026.516.143833`

References

CWEs

CWE-287 CWE-295

Verify integrity in audit chain (admin only). AS-IS.