CVE-2026-32253 json
Sunshine: Authentication bypass via improper client certificate validation
published 2026-05-22 5 mo ago modified 2026-07-23 3 mo ago also EUVD-2026-31469
- cvss
- 9.8
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.3%
- EPSS 0.3% chance of exploitation in 30 days, percentile 21%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- lizardbyte sunshine 2026.516.143833
CISA SSVC
- Exploitation
- Proof of concept is public
- Automatable
- yes
- Technical impact
- total
- Assessed
- 5 mo ago
Exploit prediction
0.29% chance of exploitation in the next 30 days, higher than 21% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- github.com https://github.com/LizardByte/Sunshine/security/advisories/GHSA-ph75-mgxh-mv57 referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
Affected products
- LizardByte Sunshine
Classification
References
-
github.com
/LizardByte/Sunshine/security/advisories/GHSA-ph75-mgxh-mv57
exploit, vendor-advisory
-
github.com
/LizardByte/Sunshine/releases/tag/v2026.516.143833
product, release-notes
Sources
- CVE List CVE-2026-32253
- NVD CVE-2026-32253
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