Description
OpenLiteSpeed through 1.9.4 contains an authentication bypass vulnerability that allows unauthenticated remote attackers to evade virtual host client certificate requirements over HTTP/3. Because QuicStream inherits a verifyContext() implementation that always returns true, attackers can present a non-mTLS host's SNI with a protected Host header to access protected content.
Published: 2026-10-30
Score: 8.2 High
EPSS: n/a
KEV: No
Impact: n/a
Action: n/a
AI Analysis

Analysis and contextual insights are available on OpenCVE Cloud.

Remediation

No vendor fix or workaround currently provided.

Additional remediation guidance may be available on OpenCVE Cloud.

Tracking

Sign in to view the affected projects.

Advisories

No advisories yet.

History

Fri, 30 Oct 2026 11:45:00 +0000

Type Values Removed Values Added
Description OpenLiteSpeed through 1.9.4 contains an authentication bypass vulnerability that allows unauthenticated remote attackers to evade virtual host client certificate requirements over HTTP/3. Because QuicStream inherits a verifyContext() implementation that always returns true, attackers can present a non-mTLS host's SNI with a protected Host header to access protected content.
Title OpenLiteSpeed through 1.9.4 mTLS Bypass via HTTP/3 SNI and Host Mismatch
First Time appeared Litespeedtech
Litespeedtech openlitespeed
Weaknesses CWE-295
CPEs cpe:2.3:a:litespeedtech:openlitespeed:*:*:*:*:*:*:*:*
Vendors & Products Litespeedtech
Litespeedtech openlitespeed
References
Metrics cvssV3_1

{'score': 5.9, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N'}

cvssV4_0

{'score': 8.2, 'vector': 'CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N'}


Subscriptions

Litespeedtech Openlitespeed
cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-10-30T11:31:08.276Z

Reserved: 2026-10-30T10:53:29.316Z

Link: CVE-2026-119559

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-10-30T12:16:43.210

Modified: 2026-10-30T12:16:43.210

Link: CVE-2026-119559

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-30T13:30:12Z

Weaknesses
  • CWE-295

    Improper Certificate Validation