{"id":"GHSA-5528-5vmv-3xc2","summary":"Multer Vulnerable to Denial of Service via Uncontrolled Recursion","details":"### Impact\n\nA vulnerability in Multer versions \u003c 2.1.1 allows an attacker to trigger a Denial of Service (DoS) by sending malformed requests, potentially causing stack overflow.\n\n### Patches\n\nUsers should upgrade to `2.1.1`\n\n### Workarounds\n\nNone\n\n### Resources\n\n- https://github.com/expressjs/multer/security/advisories/GHSA-5528-5vmv-3xc2\n- https://www.cve.org/CVERecord?id=CVE-2026-3520\n- https://github.com/expressjs/multer/commit/7e66481f8b2e6c54b982b34c152479e096ce2752\n- https://cna.openjsf.org/security-advisories.html","aliases":["CVE-2026-3520"],"modified":"2026-03-06T23:43:55.105849Z","published":"2026-03-05T00:27:50Z","related":["CGA-432f-7mj6-gpqf"],"database_specific":{"nvd_published_at":"2026-03-04T17:16:22Z","github_reviewed":true,"github_reviewed_at":"2026-03-05T00:27:50Z","severity":"HIGH","cwe_ids":["CWE-674"]},"references":[{"type":"WEB","url":"https://github.com/expressjs/multer/security/advisories/GHSA-5528-5vmv-3xc2"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-3520"},{"type":"WEB","url":"https://github.com/expressjs/multer/commit/7e66481f8b2e6c54b982b34c152479e096ce2752"},{"type":"WEB","url":"https://cna.openjsf.org/security-advisories.html"},{"type":"PACKAGE","url":"https://github.com/expressjs/multer"},{"type":"WEB","url":"https://www.cve.org/CVERecord?id=CVE-2026-3520"}],"affected":[{"package":{"name":"multer","ecosystem":"npm","purl":"pkg:npm/multer"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"2.1.1"}]}],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/03/GHSA-5528-5vmv-3xc2/GHSA-5528-5vmv-3xc2.json"}}],"schema_version":"1.7.3","severity":[{"type":"CVSS_V4","score":"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"}]}