Is multer 1.1 vulnerable?

npm · 1 release from 1.1.0 to 1.1.0 · latest multer is 2.5.0 · checked 2 Nov 2026

Yes: 8 known advisories

Yes. multer 1.1.0, the last 1.1 release, is affected by 8 known security advisories (7 high, 1 low), including CVE-2026-77078, CVE-2026-82333, CVE-2026-5079. Upgrade to 2.3.0 or later to fix all of them.

Upgrade with:npm install multer@2.3.0

Is your project affected?

Private repo? Upload its lockfile instead, or connect GitHub to check every repo.

Advisories affecting multer 1.1.0

  • HighCVE-2026-77078GHSA-wc9g-mqfw-jrwm8 Sept 2026

    multer vulnerable to Denial of Service via crafted multipart field names

    Affected
    <2.3.0
    Fixed in
    2.3.0
  • LowCVE-2026-77063GHSA-qvfw-j98x-7q728 Sept 2026

    multer vulnerable to file size limit bypass via async fileFilter race condition

    Affected
    <2.3.0
    Fixed in
    2.3.0
  • HighCVE-2026-82333GHSA-535w-7cp7-47q48 Sept 2026

    multer vulnerable to Denial of Service via oversized array index in field names

    Affected
    <2.3.0
    Fixed in
    2.3.0
  • HighCVE-2026-5079GHSA-72gw-mp4g-v24j17 Jun 2026

    Multer vulnerable to Denial of Service via deeply nested field names

    Affected
    >=1.0.0 <2.2.0 · >=3.0.0-alpha.1 <3.0.0-alpha.2
    Fixed in
    2.2.0, 3.0.0-alpha.2
  • HighCVE-2026-3520GHSA-5528-5vmv-3xc25 Mar 2026

    Multer Vulnerable to Denial of Service via Uncontrolled Recursion

    Affected
    <2.1.1
    Fixed in
    2.1.1
  • HighCVE-2026-3304GHSA-xf7r-hgr6-v32p1 Mar 2026

    Multer vulnerable to Denial of Service via incomplete cleanup

    Affected
    <2.1.0
    Fixed in
    2.1.0
  • HighCVE-2026-2359GHSA-v52c-386h-88mc1 Mar 2026

    Multer vulnerable to Denial of Service via resource exhaustion

    Affected
    <2.1.0
    Fixed in
    2.1.0
  • HighCVE-2025-47935GHSA-44fp-w29j-9vj519 May 2025

    Multer vulnerable to Denial of Service via memory leaks from unclosed streams

    Affected
    <2.0.0
    Fixed in
    2.0.0

Which of your client projects are still on multer 1.1?

NPMscan reads the lockfiles in every GitHub repo you pick, finds the exact multer version each one installs, and checks it against these advisories. Each finding comes with the command that fixes it.

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Other multer versions

Advisory data from OSV.dev (opens OSV.dev in a new tab), which includes the GitHub Advisory Database. Release list from the npm registry. Refreshed daily.