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.
CVE-2025-48997
This high-severity CVE scores 8.7 under NVD CVSS v3. EPSS exploit probability: 0.2%, top 52% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).
- High severity, but no confirmed exploitation yet
A fix is available — apply it.
- CVSS v3
- 8.7
- EG Score
- 8.7(medium)
- EPSS
- 28.8%
- KEV
- Not listed
Published
June 3, 2025
Last Modified
April 15, 2026
References (4)
- security-advisories@githubhttps://github.com/expressjs/multer/commit/35a3272b611945155e046dd5cef11088587635e9
- security-advisories@githubhttps://github.com/expressjs/multer/issues/1233
- security-advisories@githubhttps://github.com/expressjs/multer/pull/1256
- security-advisories@githubhttps://github.com/expressjs/multer/security/advisories/GHSA-g5hg-p3ph-g8qg
Patch Availability(1)
| Vendor / Ecosystem | Fixed in / Patch | Released | Source |
|---|---|---|---|
| redhat | rhdh/rhdh-hub-rhel9:sha256:aa3c5b50c65aee51b932fafcbf479ce54f15496cffc2744860bd9e135cce815c | 2025-08-19 | redhat |
Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.
Affected Packages
(1 across 1 ecosystem)
npm(1)
| Package | Vulnerable range | Fixed in | Dependents |
|---|---|---|---|
| multer | — | 2.0.1 | — |
Weakness Classification(1)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
All Vendor Advisories
(1)
Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.
Data Freshness Timeline
(refreshed 9× in last 7d / 45× in last 30d)
Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.
Showing the most recent 100 of 108 total refreshes for this CVE.
- 2026-07-11 08:27 UTCEPSS rescore
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- 2026-06-08 16:09 UTCVendor advisory
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- 2026-05-21 13:09 UTCVendor advisory
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Frequently asked(5)
What is CVE-2025-48997?
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Is CVE-2025-48997 actively exploited?
What is the CVSS score of CVE-2025-48997?
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Dependency Blast Radius
See which npm, PyPI, Go, and Maven packages are affected by CVE-2025-48997
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