{"action":"Upgrade github.com/refraction-networking/utls to 1.8.1 or later.","affected":[{"fixed":"1.8.1","introduced":"1.6.0"}],"component":"github.com/refraction-networking/utls","cve_ids":["CVE-2026-27017"],"ecosystem":"Go","epss":0.00175,"exploited":false,"fixed_versions":["1.8.1"],"ghsa_id":"GHSA-7m29-f4hw-g2vx","id":"tcs_01M5KGE5CN0WGBM6TW3EV76A2G","modified_at":"2026-02-24T23:41:14.415506Z","published_at":"2026-02-24T23:10:26Z","references":["https://osv.dev/vulnerability/GO-2026-4509","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/releases/tag/v1.8.1"],"severity":{"label":"medium","score":5.3},"sources":[{"source":"osv","source_id":"GO-2026-4509","url":"https://osv.dev/vulnerability/GO-2026-4509"},{"source":"nvd","source_id":"CVE-2026-27017","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-27017"}],"summary":"Fingerprint vulnerability in uTLS from GREASE ECH mismatch for Chrome parrots in github.com/refraction-networking/utls"}