github.com/refraction-networking/utls

3 known vulnerabilities.

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Low 2.3

CVE-2026-27017

uTLS has a Chrome Parrot Fingerprint Vulnerability due to GREASE ECH Cipher Suite Mismatch

uTLS is a fork of crypto/tls, created to customize ClientHello for fingerprinting resistance while still using it for the handshake. Versions 1.6.0 through 1.8.0 contain a fingerprint mismatch with Chrome when using GREASE ECH, related to cipher suite selecti…

refraction-networking utls github.com/refraction-networking/utls golang-refraction-networking-utls Ubuntu Go

Feb 20, 2026