{"id":"CVE-2025-48997","aliases":["CLSA-2026-1773879509","EUVD-2025-16780","GHSA-g5hg-p3ph-g8qg","ROOT-APP-NPM-CVE-2025-48997"],"status":"published","title":"Multer vulnerable to Denial of Service via unhandled exception","description":"Multer is a node.js middleware for handling `multipart/form-data`. A vulnerability that is present starting in version 1.4.4-lts.1 and prior to version 2.0.1 allows an attacker to trigger a Denial of Service (DoS) by sending an upload file request with an empty string field name. This request causes an unhandled exception, leading to a crash of the process. Users should upgrade to `2.0.1` to receive a patch. No known workarounds are available.","severity":{"version":"4.0","score":8.7,"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","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.00482,"percentile":0.41848,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-248"],"published":"2025-06-03T18:21:59Z","modified":"2026-10-28T02:31:12Z","fixes":[{"ecosystem":"npm","package":"multer","fixed_in":["2.0.1"],"sources":["ghsa","osv"]},{"ecosystem":"Root:npm","package":"multer","fixed_in":["1.4.4-lts.1-aikido.3","1.4.5-lts.2-aikido.9","1.4.5-lts.2-aikido.5","1.4.4-lts.1-aikido.4","1.4.5-lts.1-aikido.2","1.4.5-lts.1-aikido.3","1.4.4-aikido.3","1.4.4-aikido.4","1.4.5-lts.1-aikido.1","1.4.4-lts.1-aikido.2","1.4.4-aikido.5","1.4.5-lts.2-aikido.6","1.4.4-aikido.6","1.4.5-lts.2-aikido.7","1.4.5-lts.2-aikido.8"],"sources":["osv"]},{"ecosystem":"Root:npm","package":"@rootio/multer","fixed_in":["1.4.4-lts.1-root.io.3","1.4.5-lts.2-root.io.4","1.4.5-lts.2-root.io.9","1.4.5-lts.2-root.io.5","1.4.4-lts.1-root.io.4","1.4.5-lts.1-root.io.2","1.4.5-lts.1-root.io.3","1.4.4-root.io.3","1.4.4-root.io.4","1.4.5-lts.1-root.io.1","1.4.4-lts.1-root.io.2","1.4.4-root.io.5","1.4.5-lts.2-root.io.6","1.4.4-root.io.6","1.4.5-lts.2-root.io.7","1.4.5-lts.2-root.io.8"],"sources":["osv"]}],"affected":[{"source":"ghsa","ecosystem":"npm","package":"multer","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"1.4.4-lts.1"},{"fixed":"2.0.1"}]}]},{"source":"osv","ecosystem":"TuxCare:npm","package":"multer","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"1.4.5-lts.1-tuxcare.0"},{"fixed":"1.4.5-lts.1-tuxcare.1"}]}],"versions":["1.4.5-lts.1"],"bundled":3},{"source":"osv","ecosystem":"npm","package":"multer","ranges":[{"type":"SEMVER","events":[{"introduced":"1.4.4-lts.1"},{"fixed":"2.0.1"}]}]},{"source":"osv","ecosystem":"Root:npm","package":"multer","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.4.4-lts.1-aikido.3"},{"fixed":"1.4.5-lts.2-aikido.9"},{"fixed":"1.4.5-lts.2-aikido.5"},{"fixed":"1.4.4-lts.1-aikido.4"},{"fixed":"1.4.5-lts.1-aikido.2"},{"fixed":"1.4.5-lts.1-aikido.3"},{"fixed":"1.4.4-aikido.3"},{"fixed":"1.4.4-aikido.4"},{"fixed":"1.4.5-lts.1-aikido.1"},{"fixed":"1.4.4-lts.1-aikido.2"},{"fixed":"1.4.4-aikido.5"},{"fixed":"1.4.5-lts.2-aikido.6"},{"fixed":"1.4.4-aikido.6"},{"fixed":"1.4.5-lts.2-aikido.7"},{"fixed":"1.4.5-lts.2-aikido.8"}]}]},{"source":"osv","ecosystem":"Root:npm","package":"@rootio/multer","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.4.4-lts.1-root.io.3"},{"fixed":"1.4.5-lts.2-root.io.4"},{"fixed":"1.4.5-lts.2-root.io.9"},{"fixed":"1.4.5-lts.2-root.io.5"},{"fixed":"1.4.4-lts.1-root.io.4"},{"fixed":"1.4.5-lts.1-root.io.2"},{"fixed":"1.4.5-lts.1-root.io.3"},{"fixed":"1.4.4-root.io.3"},{"fixed":"1.4.4-root.io.4"},{"fixed":"1.4.5-lts.1-root.io.1"},{"fixed":"1.4.4-lts.1-root.io.2"},{"fixed":"1.4.4-root.io.5"},{"fixed":"1.4.5-lts.2-root.io.6"},{"fixed":"1.4.4-root.io.6"},{"fixed":"1.4.5-lts.2-root.io.7"},{"fixed":"1.4.5-lts.2-root.io.8"}]}]}],"products":[{"vendor":"expressjs","product":"multer"}],"references":[{"url":"https://github.com/expressjs/multer/security/advisories/GHSA-g5hg-p3ph-g8qg","tags":["x_refsource_CONFIRM","advisory","web"]},{"url":"https://github.com/expressjs/multer/issues/1233","tags":["x_refsource_MISC","report","web"]},{"url":"https://github.com/expressjs/multer/pull/1256","tags":["x_refsource_MISC","fix","web"]},{"url":"https://github.com/expressjs/multer/commit/35a3272b611945155e046dd5cef11088587635e9","tags":["x_refsource_MISC","fix","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2025-48997","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-g5hg-p3ph-g8qg"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/48xxx/CVE-2025-48997.json","tags":["advisory"]},{"url":"https://github.com/expressjs/multer","tags":["package"]}],"sources":{"cve":[{"id":"CVE-2025-48997","title":"Multer vulnerable to Denial of Service via unhandled exception","description":"Multer is a node.js middleware for handling `multipart/form-data`. A vulnerability that is present starting in version 1.4.4-lts.1 and prior to version 2.0.1 allows an attacker to trigger a Denial of Service (DoS) by sending an upload file request with an empty string field name. This request causes an unhandled exception, leading to a crash of the process. Users should upgrade to `2.0.1` to receive a patch. No known workarounds are available.","status":"published","published":"2025-06-03T18:21:59.527Z","modified":"2025-06-03T18:30:13.178Z","cvss":[{"version":"4.0","score":8.7,"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","level":"high","assessor":"cna"}],"cwes":["CWE-248"],"updated_at":"2026-11-02T14:32:41.41198Z"}],"euvd":[{"id":"EUVD-2025-16780","description":"Multer is a node.js middleware for handling `multipart/form-data`. A vulnerability that is present starting in version 1.4.4-lts.1 and prior to version 2.0.1 allows an attacker to trigger a Denial of Service (DoS) by sending an upload file request with an empty string field name. This request causes an unhandled exception, leading to a crash of the process. Users should upgrade to `2.0.1` to receive a patch. No known workarounds are available.","status":"published","published":"2025-06-03T18:21:59Z","modified":"2025-06-03T18:30:13Z","cvss":[{"version":"4.0","score":8.7,"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","level":"high"}],"updated_at":"2026-11-02T20:32:30.496028Z"}],"ghsa":[{"id":"GHSA-g5hg-p3ph-g8qg","title":"Multer vulnerable to Denial of Service via unhandled exception","description":"### Impact\n\nA vulnerability in Multer versions \u003e=1.4.4-lts.1, \u003c2.0.1 allows an attacker to trigger a Denial of Service (DoS) by sending an upload file request with an empty string field name. This request causes an unhandled exception, leading to a crash of the process.\n\n### Patches\n\nUsers should upgrade to `2.0.1`\n\n### Workarounds\n\nNone\n\n### References\n\nhttps://github.com/expressjs/multer/commit/35a3272b611945155e046dd5cef11088587635e9\nhttps://github.com/expressjs/multer/issues/1233\nhttps://github.com/expressjs/multer/pull/1256","status":"published","published":"2025-06-05T01:09:35Z","modified":"2025-06-05T01:09:36Z","cvss":[{"version":"4.0","score":8.7,"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","level":"high"}],"cwes":["CWE-248"],"updated_at":"2026-11-02T14:38:45.948817Z"}],"nvd":[{"id":"CVE-2025-48997","description":"Multer is a node.js middleware for handling `multipart/form-data`. A vulnerability that is present starting in version 1.4.4-lts.1 and prior to version 2.0.1 allows an attacker to trigger a Denial of Service (DoS) by sending an upload file request with an empty string field name. This request causes an unhandled exception, leading to a crash of the process. Users should upgrade to `2.0.1` to receive a patch. No known workarounds are available.","status":"published","published":"2025-06-03T19:15:39.577Z","modified":"2026-06-17T09:30:38.507Z","cvss":[{"version":"4.0","score":8.7,"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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"high","assessor":"secondary"}],"cwes":["CWE-248"],"updated_at":"2026-11-02T14:11:10.143444Z"}],"osv":[{"id":"CVE-2025-48997","title":"Multer vulnerable to Denial of Service via unhandled exception","description":"Multer is a node.js middleware for handling `multipart/form-data`. A vulnerability that is present starting in version 1.4.4-lts.1 and prior to version 2.0.1 allows an attacker to trigger a Denial of Service (DoS) by sending an upload file request with an empty string field name. This request causes an unhandled exception, leading to a crash of the process. Users should upgrade to `2.0.1` to receive a patch. No known workarounds are available.","status":"published","published":"2025-06-03T18:21:59.527Z","modified":"2026-10-28T02:31:12.53716385Z","cvss":[{"version":"4.0","score":8.7,"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","level":"high"}],"cwes":["CWE-248"],"updated_at":"2026-11-02T15:44:50.037003Z"},{"id":"GHSA-g5hg-p3ph-g8qg","title":"Multer vulnerable to Denial of Service via unhandled exception","description":"### Impact\n\nA vulnerability in Multer versions \u003e=1.4.4-lts.1, \u003c2.0.1 allows an attacker to trigger a Denial of Service (DoS) by sending an upload file request with an empty string field name. This request causes an unhandled exception, leading to a crash of the process.\n\n### Patches\n\nUsers should upgrade to `2.0.1`\n\n### Workarounds\n\nNone\n\n### References\n\nhttps://github.com/expressjs/multer/commit/35a3272b611945155e046dd5cef11088587635e9\nhttps://github.com/expressjs/multer/issues/1233\nhttps://github.com/expressjs/multer/pull/1256","status":"published","published":"2025-06-05T01:09:35Z","modified":"2026-09-10T03:50:25.185745509Z","cvss":[{"version":"4.0","score":8.7,"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","level":"high"}],"cwes":["CWE-248"],"updated_at":"2026-11-02T15:46:47.472172Z"},{"id":"CLSA-2026-1773879509","title":"TuxCare security update for multer (3 CVEs)","description":"TuxCare rebuilt multer to address 3 CVEs. Fixed in 1.4.5-lts.1-tuxcare.1.","status":"published","published":"2026-08-04T14:52:13Z","modified":"2026-10-15T09:47:47.30524478Z","updated_at":"2026-11-02T15:43:43.621843Z"},{"id":"ROOT-APP-NPM-CVE-2025-48997","title":"CVE-2025-48997 in multer - Patched by Root","description":"Root has patched CVE-2025-48997 in the multer package for Root:npm. Multiple fixed versions available.","status":"published","published":"2026-09-15T18:19:46Z","modified":"2026-09-15T19:15:03.051619803Z","updated_at":"2026-11-02T15:53:27.362922Z"}]}}