CVE-2025-48997

HIGHNVD 8.78.7—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 8.7 under NVD CVSS v3. EPSS exploit probability: 0.4%, top 71% 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).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
8.7EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 8.7Exploit: None knownExposed: 0

A fix is available — apply it.

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.

CVSS v3
8.7
EG Score
8.7(medium)
EG Risk
54(Track)
EG Risk 54/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity87% × 45%
Exploitation0% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
37%
KEV
Not listed

Published

June 3, 2025

Last Modified

April 15, 2026

Advisory Details (4)

Auto-updated Sep 1, 2026
Patch available. Sources: github_commit, github_pr, github.
github Patch Available

Multer vulnerable to Denial of Service via unhandled exception · Advisory · expressjs/multer · GitHub

https://github.com/expressjs/multer/security/advisories/GHSA-g5hg-p3ph-g8qg
github_pr

Fixes expressjs/multer#1233. Makes multer handle missing field names.

Upstream fix in progress (PR #1256 · expressjs/multer, state=closed)

https://github.com/expressjs/multer/pull/1256
generic

TypeError: Cannot read properties of undefined (reading 'length') when fieldNameSize is not set · Issue #1233 · expressjs/multer · GitHub

https://github.com/expressjs/multer/issues/1233
github_commit Patch Available

commit 35a3272b6119 (expressjs/multer)

Patch available: expressjs/multer v2.0.1 (contains commit 35a3272b6119)

https://github.com/expressjs/multer/commit/35a3272b611945155e046dd5cef11088587635e9

Vendor Advisories for CVE-2025-48997(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Patch Availability(1)

Vendor / EcosystemFixed in / PatchReleasedSource
redhatrhdh/rhdh-hub-rhel9:sha256:aa3c5b50c65aee51b932fafcbf479ce54f15496cffc2744860bd9e135cce815c2025-08-19redhat

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)
PackageVulnerable rangeFixed inDependents
multer—2.0.1—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 6× in last 7d / 30× 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 189 total refreshes for this CVE.

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Frequently asked(5)

What is CVE-2025-48997?
CVE-2025-48997 is a high vulnerability published on June 3, 2025. 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…
When was CVE-2025-48997 disclosed?
CVE-2025-48997 was first published in the National Vulnerability Database on June 3, 2025, with the most recent update on April 15, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2025-48997 actively exploited?
CVE-2025-48997 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 62.6% of all scored CVEs.
What is the CVSS score of CVE-2025-48997?
CVE-2025-48997 has a CVSS v3 base score of 8.7 (NVD).
How do I remediate CVE-2025-48997?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2025-48997, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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