{"action":"Upgrade undici to 6.27.0 or later.","affected":[{"fixed":"6.27.0","introduced":"0"},{"fixed":"7.28.0","introduced":"7.0.0"},{"fixed":"8.5.0","introduced":"8.0.0"}],"component":"undici","cve_ids":["CVE-2026-9679"],"ecosystem":"npm","epss":0.00257,"exploited":false,"fixed_versions":["6.27.0","7.28.0","8.5.0"],"ghsa_id":"GHSA-p88m-4jfj-68fv","id":"tcs_01M5KG3183WQB3PV7VTBTBH9T4","modified_at":"2026-09-10T03:51:09.228344843Z","published_at":"2026-06-19T14:21:30Z","references":["https://osv.dev/vulnerability/GHSA-p88m-4jfj-68fv","https://github.com/nodejs/undici/security/advisories/GHSA-p88m-4jfj-68fv","https://nvd.nist.gov/vuln/detail/CVE-2026-9679","https://cna.openjsf.org/security-advisories.html","https://github.com/nodejs/undici"],"severity":{"label":"medium","score":5.9},"sources":[{"source":"osv","source_id":"GHSA-p88m-4jfj-68fv","url":"https://osv.dev/vulnerability/GHSA-p88m-4jfj-68fv"}],"summary":"undici vulnerable to HTTP header injection via Set-Cookie percent-decoding"}