{"action":"Upgrade undici to 6.28.1 or later.","affected":[{"fixed":"6.28.1","introduced":"0"},{"fixed":"7.29.1","introduced":"7.0.0"},{"fixed":"8.10.2","introduced":"8.0.0"}],"component":"undici","cve_ids":["CVE-2026-18540"],"ecosystem":"npm","epss":0.00309,"exploited":false,"fixed_versions":["6.28.1","7.29.1","8.10.2"],"ghsa_id":"GHSA-r53p-7pc4-xj5r","id":"tcs_01M5KG7Z3WMSGVJYG5HDCTR6J1","modified_at":"2026-09-29T18:30:41.154532067Z","published_at":"2026-09-29T18:22:07Z","references":["https://osv.dev/vulnerability/GHSA-r53p-7pc4-xj5r","https://github.com/nodejs/undici/security/advisories/GHSA-r53p-7pc4-xj5r","https://nvd.nist.gov/vuln/detail/CVE-2026-18540","https://github.com/nodejs/undici/commit/0160a719063fb0a77f4fdf9500b9166b91e14329","https://github.com/nodejs/undici/commit/cd8af90b38ae33c2838d54a2d629774122effe95","https://github.com/nodejs/undici/commit/ce31bc824b578008faae5d3350da66c1b5f71548","https://hackerone.com/reports/3900104","https://hackerone.com/reports/3900615","https://cna.openjsf.org/security-advisories.html","https://github.com/nodejs/undici","https://github.com/nodejs/undici/releases/tag/v6.28.1","https://github.com/nodejs/undici/releases/tag/v7.29.1","https://github.com/nodejs/undici/releases/tag/v8.10.2"],"severity":{"label":"low","score":3.7},"sources":[{"source":"osv","source_id":"GHSA-r53p-7pc4-xj5r","url":"https://osv.dev/vulnerability/GHSA-r53p-7pc4-xj5r"}],"summary":"undici vulnerable to downstream response splitting via retry interceptor"}