CVE-2025-47935
📛 CVE Title
Multer vulnerable to Denial of Service via memory leaks from unclosed streams
Description
Multer is a node.js middleware for handling `multipart/form-data`. Versions prior to 2.0.0 are vulnerable to a resource exhaustion and memory leak issue due to improper stream handling. When the HTTP request stream emits an error, the internal `busboy` stream is not closed, violating Node.js stream safety guidance. This leads to unclosed streams accumulating over time, consuming memory and file descriptors. Under sustained or repeated failure conditions, this can result in denial of service, requiring manual server restarts to recover. All users of Multer handling file uploads are potentially impacted. Users should upgrade to 2.0.0 to receive a patch. No known workarounds are available.
Overview
- State
- PUBLISHED
- Assigner (CNA)
- GitHub_M
- CVSS severity
- HIGH
- CVSS score
- 7.5 / 10
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H- Effective score
- 7.5 / 10 HIGH source: CNA overview
- CWE(s)
-
CWE-401 - Reserved
- 2025-05-14
- Published
- 2025-05-19 21:18 UTC
- Last updated
- 2025-05-27 22:28 UTC
- Source
- https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2025/47xxx/CVE-2025-47935.json
- Linked Threat
- CVE-2025-47935 — Multer vulnerable to Denial of Service via memory leaks from unclosed streams
NVD triage scoring NVD CVE 2.0
Layer NVD adds on top of the CNA's CVE record — published / last-modified timestamps, exploitability / impact subscores, and the FIRST.org EPSS probability that this CVE will be exploited in the wild in the next 30 days.
- NVD published
- 2025-05-19 20:15:25 UTC
- NVD last modified
- 2026-06-17 09:28:51 UTC
- NVD CVSS v3.1
- 7.5 / 10 HIGH source: security-advisories@github.com
- NVD CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H- Exploitability subscore
- 3.9 / 10
- Impact subscore
- 3.6 / 10
- EPSS score
- 0.0071 (probability of exploitation in next 30 days)
- EPSS percentile
- 49.78% vs all CVEs — higher = more likely to be exploited, as of 2026-07-27
NVD / KEV / EPSS data refreshed 2026-07-27 15:38 UTC. Re-run the 🛰 Backfill from NVD button above to refresh.
European Union Vulnerability Database ENISA EUVD
ENISA's official EU repository for curated vulnerability intelligence. Carries a separate identifier (EUVD-YYYY-NNNN) and frequently exposes an earlier-published description + CVSS than NVD does.
- EUVD ID
-
EUVD-2025-15797 - Assigner
- GitHub_M
- Published
- May 19, 2025, 7:18:38 PM
- Updated
- May 27, 2025, 8:28:27 PM
- EUVD base score (CVSS 3.1)
-
7.5 / 10
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - EUVD-reported EPSS
- 0.1800
- Vendors
- expressjs
- Products
-
multer (< 2.0.0)
- Aliases
-
GHSA-44fp-w29j-9vj5
ENISA description: Multer is a node.js middleware for handling `multipart/form-data`. Versions prior to 2.0.0 are vulnerable to a resource exhaustion and memory leak issue due to improper stream handling. When the HTTP request stream emits an error, the internal `busboy` stream is not closed, violating Node.js stream safety guidance. This leads to unclosed streams accumulating over time, consuming memory and file descriptors. Under sustained or repeated failure conditions, this can result in denial of service, requiring manual server restarts to recover. All users of Multer handling file uploads are potentially impacted. Users should upgrade to 2.0.0 to receive a patch. No known workarounds are available.
Affected products (1)
| Vendor | Product | Versions | Platforms |
|---|---|---|---|
| expressjs | multer |
< 2.0.0 (affected)
|
— |
Vendor references (3)
References embedded in the original CVE record by the assigning CNA.
- https://github.com/expressjs/multer/security/advisories/GHSA-44fp-w29j-9vj5 x_refsource_CONFIRM
- https://github.com/expressjs/multer/pull/1120 x_refsource_MISC
- https://github.com/expressjs/multer/commit/2c8505f207d923dd8de13a9f93a4563e59933665 x_refsource_MISC
MITRE references (3) cveawg.mitre.org
Pulled from MITRE's CVE Services API by the 🛰 Backfill from MITRE button.
- https://github.com/expressjs/multer/commit/2c8505f207d923dd8de13a9f93a4563e59933665 x_refsource_MISC
- https://github.com/expressjs/multer/pull/1120 x_refsource_MISC
- https://github.com/expressjs/multer/security/advisories/GHSA-44fp-w29j-9vj5 x_refsource_CONFIRM
Web references (0)
DuckDuckGo results ranked by threat-intel / vendor advisory domains. Generated by the 🔎 Find references (web) button above — same flow as the Remediations search.
No web references attached yet.
NVD-tagged references (3)
Reference list NVD curates from the CNA record, vendor advisories, and third-party reports. The tag chips below are NVD's analyst-assigned categories.
- https://github.com/expressjs/multer/commit/2c8505f207d923dd8de13a9f93a4563e59933665 security-advisories@github.com
- https://github.com/expressjs/multer/pull/1120 security-advisories@github.com
- https://github.com/expressjs/multer/security/advisories/GHSA-44fp-w29j-9vj5 security-advisories@github.com
Indicators (1)
IOCs linked to the auto-promoted Threat row.
| Type | Value | VirusTotal | Attached |
|---|---|---|---|
| domain |
node.js
|
no local data | 2026-05-18 21:19 UTC |
Remediations (23)
Remediations are stored against the linked Threat row; the list below is deduplicated across both pages.
-
web:blogs.oracle.com
For more information about the Critical Security Patch Update program, see the security vulnerability remediation practices page located on the Oracle Trust Center.
2026-09-16 23:44 UTC -
web:osv.dev
Comprehensive vulnerability database for your open source projects and dependencies.
2026-09-16 23:44 UTC -
web:msrc.microsoft.com
The Microsoft Security Response Center (MSRC) investigates all reports of security vulnerabilities affecting Microsoft products and services, and provides the information here as part of the ongoing effort to help you manage security risks and help keep your systems protected.
2026-09-16 23:44 UTC -
web:cvedatabase.com
Search and analyze CVE vulnerabilities with instant access to CVSS scores, affected products, and remediation guidance.
2026-09-16 23:44 UTC -
web:cve.qwiksec.com
Comprehensive CVE and CWE security vulnerability database. Search, browse, and research security vulnerabilities with detailed information, CVSS scores, and remediation guidance.
2026-09-16 23:44 UTC -
web:www.cvefind.com
CVE Find is a real-time vulnerability database indexing 393 646 security flaws ( CVE ) from MITRE, NVD, CISA KEV, CWE and CAPEC. 4211 new CVEs were published in the last 7 days. Data aggregated from: MITRE Corporation ( CVE , CWE, CAPEC), National Vulnerability Database - NIST (NVD), CISA Known Exploited Vulnerabilities (KEV), FIRST (EPSS).
2026-09-16 23:44 UTC -
web:patchapalooza.com
Microsoft Patch Tuesday vulnerability intelligence dashboard. Live CVSS scores, exploit tracking, threat analysis, and security update data from MSRC, VulnCheck, CISA KEV, and EPSS.
2026-09-16 23:44 UTC -
web:app.opencve.io
Multer is a node.js middleware for handling `multipart/form-data`. Versions prior to 2.0.0 are vulnerable to a resource exhaustion and memory leak issue due to improper stream handling. When the HTTP request stream emits an error, the internal `busboy` stream is not closed, violating Node.js stream safety guidance. This leads to unclosed streams accumulating over time, consuming memory and ...
2026-05-22 14:02 UTC -
web:cyberpress.org
A newly published proof-of-concept tool called BitUnlocker exposes a dangerous downgrade attack that can bypass Microsoft's BitLocker full-disk encryption on fully patched Windows 11 machines, granting complete access to encrypted drives in under five minutes. The attack exploits CVE - 2025 -48804, a vulnerability in Windows BitLocker that allows an attacker to mix untrusted data with trusted ...
2026-05-22 14:02 UTC -
web:docs.oracle.com
Oracle Critical Patch Update (CPU) October 2025 for Oracle Java SE Services: Java Management Release Date: October 21, 2025
2026-05-22 14:02 UTC -
web:nvd.nist.gov
Vulnerabilities All vulnerabilities in the NVD have been assigned a CVE identifier and thus, abide by the definition below. CVE defines a vulnerability as: "A weakness in the computational logic (e.g., code) found in software and hardware components that, when exploited, results in a negative impact to confidentiality, integrity, or availability. Mitigation of the vulnerabilities in this ...
2026-05-22 14:02 UTC -
web:security.snyk.io
High severity (8.7) Missing Release of Memory after Effective Lifetime in multer | CVE-2025-47935
2026-05-22 14:02 UTC -
web:source.android.com
Android partners are encouraged to fix all issues in this bulletin and use the latest security patch level. Devices that use the 2025 -11-01 security patch level must include all issues associated with that security patch level, as well as fixes for all issues reported in previous security bulletins.
2026-05-22 14:02 UTC -
web:feedly.com
Summary Security Bulletin: IBM watsonx Orchestrate Developer Edition affected by vulnerability in multer Vulnerability Details CVEID:CVE- 2025 - 47935 DESCRIPTION: Multer is a node.js middleware for handling multipart/form-data.
2026-05-22 03:21 UTC -
web:cybersecuritynews.com
No patch has been released yet; Microsoft has instead issued a multi-step manual mitigation guide while a formal security update is prepared. Windows BitLocker Security Bypass The vulnerability originates in WinRE's handling of the BootExecute registry value under HKLM\ControlSet001\Control\Session Manager.
2026-05-22 03:21 UTC -
web:portal.msrc.microsoft.com
The Security Update Guide provides information on the latest Microsoft security updates, helping users understand and address potential vulnerabilities effectively.
2026-05-22 03:21 UTC -
web:www.oracle.com
This Critical Patch Update contains 374 new security patches across the product families listed below. Please note that an MOS note summarizing the content of this Critical Patch Update and other Oracle Software Security Assurance activities is located at October 2025 Critical Patch Update: Executive Summary and Analysis.
2026-05-22 03:21 UTC -
web:www.sentinelone.com
CVE-2025-47935 is a denial of service vulnerability in Multer middleware. Learn about its impact, affected versions, and mitigation methods.
2026-05-22 03:21 UTC -
web:blog.qualys.com
EVALUATE Vendor-Suggested Mitigation with Policy Audit With Qualys Policy Audit's Out-of-the-Box Mitigation or Compensatory Controls, reduce the risk of a vulnerability being exploited because the remediation ( fix / patch ) cannot be done now; these security controls are not recommended by any industry standards, such as CIS, DISA-STIG.
2026-05-22 03:21 UTC -
web:www.esri.com
Key highlights The ArcGIS Server Security 2025 update 2 is available This patch resolves 10 Medium severity vulnerabilities This security patch is cumulative, and includes fixes provided in the ArcGIS Server Security 2025 update 1.
2026-05-22 03:21 UTC -
web:krebsonsecurity.com
Microsoft Corp. today issued security updates to fix more than 80 vulnerabilities in its Windows operating systems and software. There are no known "zero-day" or actively exploited ...
2026-05-22 03:21 UTC -
web:www.forbes.com
"Microsoft says it's rolling out an emergency patch that should address localhost-related issues in Windows 11 24H2/25H2, but remember, the hotfix could take longer than 48 hours to show on ...
2026-05-22 03:21 UTC -
web:nvd.nist.gov
An official website of the United States government Here's how you know
2026-05-22 03:21 UTC
AI Forensic Analysis
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Raw JSON
The full cvelistV5 record. Download as CVE-2025-47935.json.
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