Go/github.com/refraction-networking/utls CVE-2026-27017: medium 5.3, EPSS 0.18%

uTLS has a fingerprint vulnerability from GREASE ECH mismatch for Chrome parrots

Action: Upgrade github.com/refraction-networking/utls to 1.8.1 or later.

go get github.com/refraction-networking/utls@v1.8.1

Affected

Fixed versions

Sources

• osv: GHSA-7m29-f4hw-g2vx
• nvd: CVE-2026-27017
• https://github.com/refraction-networking/utls/security/advisories/GHSA-7m29-f4hw-g2vx
• https://github.com/refraction-networking/utls/commit/24bd1e05a788c1add7f3037f4532ea552b2cee07
• https://github.com/refraction-networking/utls
• https://github.com/refraction-networking/utls/releases/tag/v1.8.1
• https://pkg.go.dev/vuln/GO-2026-4509

CVE-2026-27017 · published 2026-02-18T22:33:18Z · modified 2026-09-10T03:50:34.315551939Z · JSON