CVE-2025-7338Public exploitNetwork attack vector

Process crash via malformed multipart boundary

Published Jul 17, 2025 · Updated Jul 17, 2025

Uncaught exception in Multer 1.4.4-lts.1 through 2.0.1 allows remote attackers to crash the Node.js process via a malformed upload. The makeMiddleware file handler registers file-stream error handling after an early-return path, so an empty filename followed by a truncated final boundary emits an unhandled error. A multipart upload route reachable without authentication is sufficient to interrupt its hosting process, with no reported data disclosure or modification.

CVSS severity7.5
High
EPSS probability0.71%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Uncaught exception in Multer 1.4.4-lts.1 through 2.0.1 allows remote attackers to crash the Node.js process via a malformed upload. The makeMiddleware file handler registers file-stream error handling after an early-return path, so an empty filename followed by a truncated final boundary emits an unhandled error. A multipart upload route reachable without authentication is sufficient to interrupt its hosting process, with no reported data disclosure or modification.

The record

CVE
CVE-2025-7338
Published
Jul 17, 2025
Updated
Jul 17, 2025
Vendor
body-parser
Product
Multer
Classifications
CWE-248, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 17, 2025CVE publishedPublication date reported by the CVE source.
  2. Jul 17, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=1.4.4-lts.1 <2.0.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

body-parser · Multerversion=1.4.4-lts.1 <2.0.2

Published CVSS scores

7.5GitHub Advisory DatabaseCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-248Uncaught Exception
T1499.004Application or System Exploitation

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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