CVE-2026-119559
Medium
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.
SeverityMedium
CVSS5.9
Exploit probability—
ProductLitespeedtech Openlitespeed
PublishedOct 30, 2026
First seenNov 4, 2026
Weakness typeCWE-295CWE-295
How to fix
Sources list no fixed version or patch link for this vulnerability.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| litespeedtech openlitespeed | v ≤ 1.9.4 | — |
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