# github.com/refraction-networking/utls (Go) vulnerabilities

2 known vulnerabilities (1 medium, 1 low), with the versions each affects and the releases that fix them.

## At a glance

- Latest release: not known (cve.now hasn't read this package's releases)
- Newest unaffected release: not known without release data
- Registry: https://pkg.go.dev/github.com/refraction-networking/utls

## Advisories (2)

### [CVE-2026-26994](https://cve.now/CVE-2026-26994): uTLS ServerHellos are accepted without checking TLS 1.3 downgrade canaries

- Severity: Medium 6.5
- Published: Feb 20, 2026
- Affected: fixed in 1.7.0; from 1.0.0, fixed in 1.7.0.

### [CVE-2026-27017](https://cve.now/CVE-2026-27017): uTLS has a Chrome Parrot Fingerprint Vulnerability due to GREASE ECH Cipher Suite Mismatch

- Severity: Low 2.3
- Published: Feb 20, 2026
- Affected: from 1.6.0, fixed in 1.8.1.

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