CVE-2026-32253 — Security Box Score

CVE · referencelatest edition

Reference page — cumulative record through Wednesday, August 19, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2026-32253CRITICAL

LizardByte Sunshine — Sunshine: Authentication bypass via improper client certificate validation

  AV  AC  PR  UI  S  C  I  A   CVSS    EPSS   %ile   KEV
   N   L   N   N  U  H  H  H    9.8   .0029   21.7     —

AFFECTED
  Product   Versions             Fixed
  Sunshine  < 2026.516.143833 –  —

TIMELINE
  Mar 11  Reserved by GitHub_M
  May 22  EXPLOIT PUBLISHED — CVE-2026-32253 (LizardByte Sunshine). Public exploit reference added.
  May 22  Published (CNA: GitHub_M)

CWE-287, CWE-295 · CNA: GitHub_M · CVSS v3.1 · 2 references · NVD status: Analyzed

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.

Lifecycle

Complete event history — 3 events, chronological
Date	Event	Detail
March 11, 2026	Reserved	Reserved by GitHub_M
May 22, 2026	EXPLOIT PUBLISHED	EXPLOIT PUBLISHED — CVE-2026-32253 (LizardByte Sunshine). Public exploit reference added.
May 22, 2026	Published	Published (CNA: GitHub_M)

Affected

Affected products and packages — 1 row
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
LizardByte	Sunshine	—	< 2026.516.143833	—

Weaknesses

CWE-287 · CWE-295

References (2)

https://github.com/LizardByte/Sunshine/releases/tag/v2026.516.143833 [Product, Release Notes]
https://github.com/LizardByte/Sunshine/security/advisories/GHSA-ph75-mgxh-mv57 [Exploit, Vendor Advisory]

Authoritative record: CVE-2026-32253 at cve.org

Vendors: lizardbyte

Weaknesses: CWE-287 · CWE-295

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-32253 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Wednesday, August 19, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.