{"action":"Upgrade nodemailer to 10.0.10 or later.","affected":[{"fixed":"10.0.10","introduced":"3.0.0"}],"component":"nodemailer","cve_ids":["CVE-2026-110871"],"ecosystem":"npm","epss":0.00381,"exploited":false,"fixed_versions":["10.0.10"],"ghsa_id":"GHSA-39m8-27wv-hr27","id":"tcs_01M5JMCDQX7H1X99CZT2X4EQ65","modified_at":"2026-10-22T16:15:47.127282008Z","published_at":"2026-10-22T16:07:04Z","references":["https://osv.dev/vulnerability/GHSA-39m8-27wv-hr27","https://github.com/nodemailer/nodemailer/security/advisories/GHSA-39m8-27wv-hr27","https://nvd.nist.gov/vuln/detail/CVE-2026-110871","https://github.com/nodemailer/nodemailer/commit/28a5909cec27646cb001dc7e97a8f5d26c973078","https://github.com/nodemailer/nodemailer","https://github.com/nodemailer/nodemailer/releases/tag/v10.0.10","https://www.vulncheck.com/advisories/nodemailer-3.0.0-before-10.0.10-quadratic-dkim-header-unfolding-denial-of-service"],"severity":{"label":"medium","score":6.5},"sources":[{"source":"osv","source_id":"GHSA-39m8-27wv-hr27","url":"https://osv.dev/vulnerability/GHSA-39m8-27wv-hr27"}],"summary":"Nodemailer: Quadratic (O(n^2)) DKIM header unfolding lets a large folded header cause remote denial of service during signing"}