chore(deps): update dependency multer to v2.2.0 [security]#1821
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This PR contains the following updates:
2.1.1→2.2.0Multer vulnerable to Denial of Service via incomplete cleanup of aborted uploads
CVE-2026-5038 / GHSA-3p4h-7m6x-2hcm
More information
Details
Impact
A vulnerability in Multer allows an attacker to trigger a Denial of Service (DoS) by aborting or sending malformed multipart uploads, causing orphaned partial files to accumulate on disk when using diskStorage.
Patches
Users should upgrade to
2.2.0,3.0.0-alpha.2or higherWorkarounds
None
Severity
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:LReferences
This data is provided by the GitHub Advisory Database (CC-BY 4.0).
Multer vulnerable to Denial of Service via deeply nested field names
CVE-2026-5079 / GHSA-72gw-mp4g-v24j
More information
Details
Impact
Multer is vulnerable to a Denial of Service (DoS) via deeply nested field names in multipart form data. The
append-fielddependency parses bracket notation in field names (e.g.,a[b][c]) with no limit on nesting depth, allowing an attacker to force allocation of deeply nested object structures that consume CPU and memory. A single HTTP request with a crafted multipart body is sufficient to exploit this.Patches
Users should upgrade to
2.2.0and configurelimits.fieldNestingDepthto the minimum depth their application requires.Workarounds
Set
limits.fieldsto a reasonable value to reduce the number of fields an attacker can send per request. This does not fully mitigate the issue but limits the impact.Severity
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HReferences
This data is provided by the GitHub Advisory Database (CC-BY 4.0).
Release Notes
expressjs/multer (multer)
v2.2.0Compare Source
Configuration
📅 Schedule: (in timezone Europe/London)
🚦 Automerge: Enabled.
♻ Rebasing: Whenever PR is behind base branch, or you tick the rebase/retry checkbox.
🔕 Ignore: Close this PR and you won't be reminded about this update again.
This PR was generated by Mend Renovate. View the repository job log.