{"cve":"CVE-2026-34752","nvd":{"published":"2026-04-02T19:21:33.517","modified":"2026-10-06T22:10:00.247","status":"Analyzed","description":"Haraka is a Node.js mail server. Prior to version 3.1.4, sending an email with __proto__: as a header name crashes the Haraka worker process. This issue has been patched in version 3.1.4.","cvss_v4":{"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","score":8.7},"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":7.5},"cwes":["CWE-248"],"references":["https://github.com/haraka/Haraka/releases/tag/v3.1.4","https://github.com/haraka/Haraka/security/advisories/GHSA-xph3-r2jf-4vp3"],"products":["haraka_project:haraka"],"source":"nvd","synced_at":"2026-10-19T22:28:18.033120106+00:00"},"epss":{"cve":"CVE-2026-34752","score":0.00432,"percentile":0.37145,"date":"2026-10-25"},"kev":null,"osv":[{"id":"GHSA-xph3-r2jf-4vp3","url":"https://osv.dev/vulnerability/GHSA-xph3-r2jf-4vp3","summary":"Haraka affected by DoS via `__proto__` email header","modified":"2026-04-06T17:56:38.130744Z","packages":[{"ecosystem":"npm","name":"Haraka","purl":"pkg:npm/Haraka","ranges":["<3.1.4"],"fixed":["3.1.4"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}