CVE-2026-32253: LizardByte Sunshine · Improper Authentication
Affects LizardByte SunshineSource CVE Database V5
Not known to be exploited · CVSS 9.8 Critical : upgrade to 2026.516.143833 as a priority.
Data as of 30 Oct 2026, 11:52 UTC
- EPSS
- 0.2% chance of exploitation in 30 days – higher than 21% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- Patch
- Available – fixed in 2026.516.143833
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HExploitation evidence
Disclosed: evidence found.
CVE published 22 May 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 24 Oct 2026.
What to do
Upgrade Sunshine and lizardbyte/Sunshine to 2026.516.143833.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| LizardByteSunshine | Affected
| Fixed in
|
GitHublizardbyte/Sunshinepkg:github/lizardbyte/SunshineOther threats | Affected
| Fixed in
|
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
AI-suggested
Upgrade LizardByte Sunshine to version 2026.516.143833 or later, where this vulnerability has been fixed. Since the vendor advisory confirms the fix in this version, applying this update fully mitigates the issue. No additional mitigations are indicated by the vendor advisory.
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.