{"affected":[{"defaultStatus":"unaffected","ecosystem":"npm","packageName":"papaparse","product":"PapaParse","source":"CNA: VulnCheck","vendor":"mholt","versions":[{"lessThan":"5.7.1","status":"affected","version":"0","versionType":"semver"}]}],"cveId":"CVE-2026-127056","cwes":["CWE-407"],"description":"PapaParse before 5.7.1 contains an inefficient algorithmic complexity vulnerability that allows remote unauthenticated attackers to cause denial of service by submitting delimiter-free quoted CSV input to Papa.parse(). Attackers can supply a single-column quoted CSV with no delimiters, triggering repeated full-buffer indexOf scans per row that grow quadratically with input size, exhausting CPU and blocking the Node.js event loop or freezing a browser tab.","epss":null,"exploits":[],"kev":null,"metrics":[{"score":8.7,"severity":"high","source":"CNA: VulnCheck","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","version":"4.0"},{"score":7.5,"severity":"high","source":"CNA: VulnCheck","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"}],"modifiedAt":1794487153552,"publishedAt":1794487153552,"references":[{"source":"CNA: VulnCheck","tags":["patch"],"url":"https://www.npmjs.com/package/papaparse"},{"source":"CNA: VulnCheck","tags":["issue-tracking"],"url":"https://github.com/mholt/PapaParse/commit/a50fe19aae08b966de444119333fe4a8b7aa6b2f"},{"source":"CNA: VulnCheck","tags":["third-party-advisory"],"url":"https://www.vulncheck.com/advisories/papaparse-before-quadratic-time-parsing-dos-via-indexof-scan"}],"remediation":[{"kind":"fix","source":"CNA: VulnCheck","text":"The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches.","url":"https://www.npmjs.com/package/papaparse"}],"revision":"b6a2a29a7719f4e9f0c6704ade56ece63d65d995e2f9bbadab613ef4c074fe6b","sources":[{"modifiedAt":1794487153552,"name":"CNA: VulnCheck","retrievedAt":1794488945266,"url":"https://www.cve.org/CVERecord?id=CVE-2026-127056"}],"ssvc":null,"status":"published","title":"PapaParse before 5.7.1 Quadratic-Time Parsing DoS via indexOf Scan","updatedAt":1794488945266}