StackPrism

npm package

multer 0.0.6 vulnerabilities, and the version that fixes all of them

multer 0.0.6 has 7 known vulnerabilities (6 rated high or critical); 2.3.0 fixes all of them. 2.3.0 has 1 known vulnerability of its own, so upgrade to 2.4.0, which has none. The maintainers deprecated this release.

npm (opens in a new tab) describes it as “Middleware for handling `multipart/form-data`.”

Known vulnerabilities
7
6 rated high or critical
Released
May 4, 2014
Latest is 2.4.0
Downloads last week
11
Under 1% of multer downloads
Licence
MIT
OpenSSF Scorecard
7.3/10
expressjs/multer (opens in a new tab)
Pulls in
9 packages
Resolved by deps.dev
Status
Deprecated release

What to upgrade to

2.4.0 is the closest release with no known vulnerabilities that we checked.

  • 0.0.7

    Newest 0.0.x release. Released May 9, 2014.

    7 known vulnerabilities, worst rated warningDeprecated

  • 2.3.0

    Fixes all 7 known vulnerabilities. Released Aug 28, 2026.

    1 known vulnerability, worst rated warning

  • 2.4.0Upgrade to this

    Latest release. Released Sep 14, 2026.

    No known vulnerabilities

2.4.0 came out on Sep 14, 2026. A coding agent trained before then doesn’t know it exists, so it may suggest an older release. AI knowledge cutoff dates

Hand the fix to your coding agent

One task with the upgrade, the file to change and why. Paste it into Claude Code, Cursor or Codex.

Findings

Every advisory for multer 0.0.6

Known exploited first (CISA KEV), then by how likely they are to be exploited (FIRST EPSS), then by severity. Each id links to its OSV.dev record.

  1. CriticalCVE-2026-3520 on OSV.dev (opens in a new tab)GHSA-5528-5vmv-3xc2EPSS: top 39%

    Multer Vulnerable to Denial of Service via Uncontrolled Recursion

    Fixed in 2.1.1. Published Mar 5, 2026.

  2. CriticalCVE-2026-3304 on OSV.dev (opens in a new tab)GHSA-xf7r-hgr6-v32pEPSS: top 42%

    Multer vulnerable to Denial of Service via incomplete cleanup

    Fixed in 2.1.0. Published Mar 1, 2026.

  3. CriticalCVE-2025-47935 on OSV.dev (opens in a new tab)GHSA-44fp-w29j-9vj5EPSS: top 45%

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

    Fixed in 2.0.0. Published May 19, 2025.

  4. CriticalCVE-2026-2359 on OSV.dev (opens in a new tab)GHSA-v52c-386h-88mcEPSS: top 49%

    Multer vulnerable to Denial of Service via resource exhaustion

    Fixed in 2.1.0. Published Mar 1, 2026.

  5. CriticalCVE-2026-77078 on OSV.dev (opens in a new tab)GHSA-wc9g-mqfw-jrwmEPSS: top 60%

    multer vulnerable to Denial of Service via crafted multipart field names

    Fixed in 2.3.0. Published Sep 8, 2026.

  6. CriticalCVE-2026-82333 on OSV.dev (opens in a new tab)GHSA-535w-7cp7-47q4EPSS: top 60%

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

    Fixed in 2.3.0. Published Sep 8, 2026.

  7. LowCVE-2026-77063 on OSV.dev (opens in a new tab)GHSA-qvfw-j98x-7q72EPSS: top 87%

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

    Fixed in 2.3.0. Published Sep 8, 2026.

Who is still on a vulnerable multer

65% of last week’s 22.6M multer downloads went to versions with known vulnerabilities.

From npm’s per-version download counts for the last 7 days, each version checked against OSV.dev. The versions checked cover over 99% of downloads.

Is multer the only one?

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How this page is checked

StackPrism asks OSV.dev which advisories affect exactly multer 0.0.6, merges duplicates filed under several ids, and ranks them with CISA’s Known Exploited Vulnerabilities list and FIRST EPSS. Release dates and deprecation come from deps.dev and npm. No AI writes this page: every sentence comes from that data, refreshed every few hours.

Last checked against npm, OSV.dev, deps.dev, CISA KEV and FIRST EPSS.