{"schemaVersion":3,"id":"CVE-2026-88932","aliases":["GHSA-3pph-fpjx-jg34","CGA-5hrc-4vgh-vf82","CGA-7rc5-r5x2-pfjh","CGA-8869-hcg4-h922","CGA-mggm-4xrx-gxhq"],"status":"published","duplicateOf":null,"title":null,"description":"multer is a Node.js middleware for handling multipart/form-data uploads. In versions 2.2.0 through 2.3.0, when a request using disk storage is aborted mid-upload, file writes that complete after multer has already run its abort cleanup are not removed, so each aborted upload can leave an orphaned file on disk. A remote unauthenticated attacker can repeatedly start and abort uploads to accumulate orphaned files and exhaust disk space, causing a denial of service. The issue is fixed in multer 2.4.0, and users should upgrade to 2.4.0 or later.","dates":{"published":"2026-09-14T08:46:12.896Z","modified":"2026-09-14T10:29:12.674Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":5.3,"severity":"medium","version":"3.1","versionLabel":"v3.1","source":"CVE.org","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","computed":false,"selection":"backend-summary"},"metrics":[{"version":"3.1","versionLabel":"v3.1","source":"CVE.org","score":5.3,"severity":"medium","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","exploitability":null,"impact":null,"computed":false},{"version":"3.1","versionLabel":"v3.1","source":"OSV · Npm","score":5.3,"severity":"medium","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","exploitability":10,"impact":2.3,"computed":true},{"version":"3.1","versionLabel":"v3.1","source":"OSV · Chainguard","score":5.3,"severity":"medium","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","exploitability":10,"impact":2.3,"computed":true},{"version":"3.1","versionLabel":"v3.1","source":"NVD","score":5.3,"severity":"medium","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","exploitability":null,"impact":null,"computed":false}]},"epss":{"probability":0.00532,"percentile":0.43824,"severity":"low","asOf":"2026-10-20T00:00:00.000Z","change":{"pp":0.218,"baselineDate":"2026-09-20T00:00:00.000Z","baselineScore":0.00314},"history":[{"date":"2026-09-14T00:00:00.000Z","score":0.00314,"percentile":null},{"date":"2026-09-15T00:00:00.000Z","score":0.00314,"percentile":null},{"date":"2026-09-16T00:00:00.000Z","score":0.00314,"percentile":null},{"date":"2026-09-17T00:00:00.000Z","score":0.00314,"percentile":null},{"date":"2026-09-18T00:00:00.000Z","score":0.00314,"percentile":null},{"date":"2026-09-19T00:00:00.000Z","score":0.00314,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.00314,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.00314,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.00314,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.00314,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.00532,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.00532,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.00532,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.00532,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.00532,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.00532,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.00532,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.00532,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.00532,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.00532,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.00532,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.00532,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.00532,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.00532,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.00532,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.00532,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.00532,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.00532,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.00532,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.00532,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.00532,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00532,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00532,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00532,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00532,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00532,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.00532,"percentile":0.43824}],"last30":[{"date":"2026-09-20T00:00:00.000Z","score":0.00314,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.00314,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.00314,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.00314,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.00532,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.00532,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.00532,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.00532,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.00532,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.00532,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.00532,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.00532,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.00532,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.00532,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.00532,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.00532,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.00532,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.00532,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.00532,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.00532,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.00532,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.00532,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.00532,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.00532,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.00532,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00532,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00532,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00532,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00532,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00532,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.00532,"percentile":0.43824}]},"kev":{"state":"not-listed","entries":[],"listedCount":0,"totalCatalogs":3,"catalogs":[{"source":"cisa","label":"CISA","listed":false,"entry":null},{"source":"enisa","label":"ENISA","listed":false,"entry":null},{"source":"circl","label":"CIRCL","listed":false,"entry":null}]},"ransomware":{"state":"none-recorded","sources":[]},"exploits":[],"exploitCount":0,"weaknesses":[{"id":"CWE-400","name":"Uncontrolled Resource Consumption","description":"The product does not properly control the allocation and maintenance of a limited resource.","type":"weakness","status":"Draft","abstraction":"Class","likelihoodOfExploit":"High","url":"https://cwe.mitre.org/data/definitions/400.html"},{"id":"CWE-459","name":"Incomplete Cleanup","description":"The product does not properly \"clean up\" and remove temporary or supporting resources after they have been used.","type":"weakness","status":"Draft","abstraction":"Base","likelihoodOfExploit":null,"url":"https://cwe.mitre.org/data/definitions/459.html"}],"affected":[{"vendor":"chainguard","product":"librechat","name":"librechat","label":"librechat","ecosystem":"Chainguard","cpePart":null,"purl":"pkg:apk/chainguard/librechat","purlType":"apk","versions":[{"text":"< 0.8.7-r15","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 0.8.7-r15","eol":null,"hubHref":null},{"vendor":"multer","product":"multer","name":"multer","label":"multer","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"≥ 2.2.0, < 2.4.0","noFixRecorded":false,"fixedIn":null}],"versionsText":"≥ 2.2.0, < 2.4.0","eol":null,"hubHref":"/vendor/multer/multer"},{"vendor":"Npm","product":"multer","name":"multer","label":"multer","ecosystem":"Npm","cpePart":null,"purl":"pkg:npm/multer","purlType":"npm","versions":[{"text":"≥ 2.2.0, < 2.4.0","noFixRecorded":false,"fixedIn":null}],"versionsText":"≥ 2.2.0, < 2.4.0","eol":null,"hubHref":null}],"affectedCount":3,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://github.com/expressjs/multer/security/advisories/GHSA-3pph-fpjx-jg34","label":"github.com/expressjs/multer/security/advisories/GHSA-3pph-fpjx-jg34","hostname":"github.com","tags":["WEB","Advisory"]},{"url":"https://cna.openjsf.org/security-advisories.html","label":"cna.openjsf.org/security-advisories.html","hostname":"cna.openjsf.org","tags":["WEB","Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-88932","label":"nvd.nist.gov/vuln/detail/CVE-2026-88932","hostname":"nvd.nist.gov","tags":["Advisory"]},{"url":"https://github.com/expressjs/multer/commit/53337f9713619ef3381ee6b4e541f926dbaac305","label":"github.com/expressjs/multer/commit/53337f9713619ef3381ee6b4e541f926dbaac305","hostname":"github.com","tags":["WEB"]},{"url":"https://github.com/expressjs/multer","label":"github.com/expressjs/multer","hostname":"github.com","tags":["PACKAGE"]},{"url":"https://github.com/expressjs/multer/releases/tag/v2.4.0","label":"github.com/expressjs/multer/releases/tag/v2.4.0","hostname":"github.com","tags":["WEB"]},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/88xxx/CVE-2026-88932.json","label":"github.com/CVEProject/cvelistV5/tree/main/cves/2026/88xxx/CVE-2026-88932.json","hostname":"github.com","tags":["Advisory"]}],"lineage":{"upstream":[],"downstream":[],"duplicates":[],"related":[]},"timeline":[{"kind":"published","date":"2026-09-14T08:46:12.896Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2026-09-14T10:29:12.674Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":21,"level":"low","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-20T18:26:36.726Z","stale":false,"partial":false}}