{"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-2026-11525"],"ecosystem":"npm","epss":0.00238,"exploited":false,"fixed_versions":["6.27.0","7.28.0","8.5.0"],"ghsa_id":"GHSA-g8m3-5g58-fq7m","id":"tcs_01M5KFR021F3HQ7C62DSC3WYQS","modified_at":"2026-09-10T03:51:08.663204806Z","published_at":"2026-06-19T14:34:46Z","references":["https://osv.dev/vulnerability/GHSA-g8m3-5g58-fq7m","https://github.com/nodejs/undici/security/advisories/GHSA-g8m3-5g58-fq7m","https://nvd.nist.gov/vuln/detail/CVE-2026-11525","https://cna.openjsf.org/security-advisories.html","https://github.com/nodejs/undici"],"severity":{"label":"low","score":3.7},"sources":[{"source":"osv","source_id":"GHSA-g8m3-5g58-fq7m","url":"https://osv.dev/vulnerability/GHSA-g8m3-5g58-fq7m"}],"summary":"undici vulnerable to Set-Cookie SameSite attribute downgrade via permissive substring matching"}