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🛡️ CVE-2026-3304 on npm (Root.io) — multer

🟠 CVSS 8.0 — High ✅ No Known Exploit OSV
8.0
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

CVE-2026-3304 in @rootio/multer - Patched by Root

Root has patched CVE-2026-3304 in the @rootio/multer package for Root:npm. Multiple fixed versions available.

Distribution advisory

This page covers CVE-2026-3304 as tracked by npm (Root.io), for the package multer. The fix is available in version 1.4.4-lts.1-root.io.2; earlier versions remain affected.

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is low, an attacker needs no privileges on the target. No user interaction is required. Rated impact: confidentiality none, integrity none, availability high. (rating taken from the base CVE record.)

CVSS metrics in full

The score comes from this vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

  • Attack vector: Network — reachable from anywhere that can route to the service.
  • Attack complexity: Low — the attack works reliably, with no preparation.
  • Attack requirements: None — no deployment-specific condition has to hold.
  • Privileges required: None — an unauthenticated stranger can try it.
  • User interaction: None — nobody has to be tricked into anything.
  • Confidentiality impact: None.
  • Integrity impact: None.
  • Availability impact: High — total loss, or loss the attacker controls.

Weakness class

ROOT-APP-NPM-CVE-2026-3304 is classified as CWE-459: Incomplete Cleanup. Temporary state is not fully removed after use, leaving data or resources behind.

Affected software

ROOT-APP-NPM-CVE-2026-3304 is recorded against 2 packages.

  • @rootio/multer (fixed in 1.4.4-lts.1-root.io.2)
  • multer (fixed in 1.4.4-lts.1-aikido.2)

Timeline and source

Published on 27 July 2026. No public exploit is currently recorded for this entry. Record sourced from OSV.

Other advisories for this package

@rootio/multer has other advisories on record. If you are patching this one, these are worth checking on the same host:

Same weakness in other software

These advisories are the same class of weakness (CWE-459: Incomplete Cleanup) in other software:

CVE-2026-3304 on other distributions

Each distribution ships its own build and its own fixed version. Pick the one you run:

Details

Severity HIGH
CVSS Score 8.0
CVSS Vector N/A
CWE N/A
Public Exploit ✅ No
Source OSV
Published 2026-07-27
Updated 2026-08-20
Modified 2026-07-27
Fix URL N/A

Affected Packages

Software From version Fixed in
@rootio/multer — 1.4.4-lts.1-root.io.2
multer — 1.4.4-lts.1-aikido.2

References

N/A

Site Security Check

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ROOT-APP-NPM-CVE-2026-3304 is rated CVSS 8.0 High. BotEraser scans your installation against known CVE records and tells you whether this vulnerability applies to the versions you actually run.

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ⓘ Data Notice: The information presented above has been compiled from publicly available internet sources. Boteraser aggregates this data solely for informational purposes and does not independently classify, evaluate, or endorse any findings about the vulnerabilities listed. The accuracy and completeness of this information is the sole responsibility of the original publishers. Boteraser and its operators accept no liability for any decisions made based on this data.

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