CVE tracker
CVE-2026-119559
CVE-2026-119559High 8.2
Research and translation in progress – available shortly.
Original description (NVD)
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.
NVD references (6)
- https://abraxaslabs.tech/research/openlitespeed-h3-mtls-verifycontext
- https://github.com/litespeedtech/openlitespeed
- https://github.com/litespeedtech/openlitespeed/blob/v1.9.4/src/http/httpsession.cpp#L1665-L1672
- https://github.com/litespeedtech/openlitespeed/blob/v1.9.4/src/quic/quicstream.h#L33-L37
- https://github.com/litespeedtech/openlitespeed/blob/v1.9.4/src/sslpp/hiocrypto.h#L49-L50
- https://www.vulncheck.com/advisories/openlitespeed-through-1.9.4-mtls-bypass-via-http-3-sni-and-host-mismatch
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Data: NVD (NIST), CISA KEV, FIRST EPSS – updated continuously.