{"action":"Upgrade github.com/refraction-networking/utls to 1.7.0 or later.","affected":[{"fixed":"1.7.0","introduced":"1.0.0"}],"component":"github.com/refraction-networking/utls","cve_ids":["CVE-2026-26994"],"ecosystem":"Go","epss":0.00302,"exploited":false,"fixed_versions":["1.7.0"],"ghsa_id":"GHSA-pmc3-p9hx-jq96","id":"tcs_01M5KG88KYGB184RMAZ5H8S5XJ","modified_at":"2026-02-18T23:56:59.171282Z","published_at":"2025-04-24T18:13:59Z","references":["https://osv.dev/vulnerability/GO-2025-3638","https://github.com/advisories/GHSA-pmc3-p9hx-jq96","https://github.com/refraction-networking/utls/commit/f8892761e2a4d29054264651d3a86fda83bc83f9","https://github.com/refraction-networking/utls/pull/337","https://github.com/refraction-networking/utls/issues/181"],"severity":{"label":"medium","score":6.5},"sources":[{"source":"osv","source_id":"GO-2025-3638","url":"https://osv.dev/vulnerability/GO-2025-3638"},{"source":"nvd","source_id":"CVE-2026-26994","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-26994"}],"summary":"ServerHellos are accepted without checking TLS 1.3 downgrade canaries in github.com/refraction-networking/utls"}