Vulnerability-Lookup

FKIE_CVE-2026-88932

Vulnerability from fkie_nvd - Published: 2026-09-14 09:17 - Updated: 2026-09-16 19:40

Severity

5.3 (Medium) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Summary

multer is a Node.js middleware for handling multipart/form-data uploads. In versions 2.2.0 through 2.3.0, when a request using disk storage is aborted mid-upload, file writes that complete after multer has already run its abort cleanup are not removed, so each aborted upload can leave an orphaned file on disk. A remote unauthenticated attacker can repeatedly start and abort uploads to accumulate orphaned files and exhaust disk space, causing a denial of service. The issue is fixed in multer 2.4.0, and users should upgrade to 2.4.0 or later.

References

	URL	Tags
	ce714d77-add3-4f53-aff5-83d477b104bb	https://cna.openjsf.org/security-advisories.html
	ce714d77-add3-4f53-aff5-83d477b104bb	https://github.com/expressjs/multer/security/advisories/GHSA-3pph-fpjx-jg34

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "packageURL": "pkg:npm/multer",
          "product": "multer",
          "vendor": "multer",
          "versions": [
            {
              "lessThan": "2.4.0",
              "status": "affected",
              "version": "2.2.0",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "2.4.0",
              "versionType": "semver"
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    }
  ],
  "id": "CVE-2026-88932",
  "lastModified": "2026-09-16T19:40:00.317",
  "metrics": {
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          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "LOW",
          "baseScore": 5.3,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
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        "impactScore": 1.4,
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        "ssvcData": {
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          "options": [
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            },
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            }
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          "role": "CISA Coordinator",
          "timestamp": "2026-09-14T10:28:47.353955Z",
          "version": "2.0.3"
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  "references": [
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    },
    {
      "source": "ce714d77-add3-4f53-aff5-83d477b104bb",
      "url": "https://github.com/expressjs/multer/security/advisories/GHSA-3pph-fpjx-jg34"
    }
  ],
  "sourceIdentifier": "ce714d77-add3-4f53-aff5-83d477b104bb",
  "vulnStatus": "Awaiting Analysis",
  "weaknesses": [
    {
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        {
          "lang": "en",
          "value": "CWE-400"
        },
        {
          "lang": "en",
          "value": "CWE-459"
        }
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      "source": "ce714d77-add3-4f53-aff5-83d477b104bb",
      "type": "Secondary"
    }
  ]
}

CVE-2026-88932 (GCVE-0-2026-88932)

Vulnerability from cvelistv5 – Published: 2026-09-14 08:46 – Updated: 2026-09-14 10:29

Title

multer vulnerable to Denial of Service via orphaned disk writes on aborted uploads

Summary

Severity

5.3 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-14 10:28 UTC

CWE

CWE-400 - Uncontrolled Resource Consumption
CWE-459 - Incomplete Cleanup

Assigner

openjs redhat root

References

2 references

URL	Tags
https://github.com/expressjs/multer/security/advi…
https://cna.openjsf.org/security-advisories.html

Impacted products

1 product

Vendor	Product	Version
multer	multer	Affected: 2.2.0 , < 2.4.0 (semver) Unaffected: 2.4.0 (semver)

Credits

euriconicacio UlisesGascon bjohansebas

Show details on NVD website

JSON

To clipboard

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        "metrics": [
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                "id": "CVE-2026-88932",
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                  },
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                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-09-14T10:28:47.353955Z",
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Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.