CVE-2026-32253Network attack vector

Unauthenticated session control via certificate verification bypass

Published May 22, 2026 · Updated May 22, 2026

Authentication bypass in LizardByte Sunshine before 2026.516.143833 allows remote attackers to access protected HTTPS endpoints. The https_server.verify path calls cert_chain_t::verify in src/crypto.cpp, whose OpenSSL callback accepts an untrusted certificate after specified verification errors. No credentials or user interaction are required; access permits unauthorized session launch, control, and remote input, with host takeover limited to full-desktop deployments.

CVSS severity9.8
Critical
EPSS probability0.29%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authentication bypass in LizardByte Sunshine before 2026.516.143833 allows remote attackers to access protected HTTPS endpoints. The https_server.verify path calls cert_chain_t::verify in src/crypto.cpp, whose OpenSSL callback accepts an untrusted certificate after specified verification errors. No credentials or user interaction are required; access permits unauthorized session launch, control, and remote input, with host takeover limited to full-desktop deployments.

The record

CVE
CVE-2026-32253
Published
May 22, 2026
Updated
May 22, 2026
Vendor
LizardByte
Product
Sunshine
Classifications
CWE-287, CWE-295, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 22, 2026CVE publishedPublication date reported by the CVE source.
  2. May 22, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 2026.516.143833

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

LizardByte · Sunshineversion=< 2026.516.143833

Published CVSS scores

9.8GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-287Improper Authentication
CWE-295Improper Certificate Validation
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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