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TI-2026-79290 Aliases CVE-2026-113872GHSA-q7qp-rjg7-q26m

Process crash in multer after aborted upload with async fileFilter

Priority LOW 39CWE-248Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
Partial Red Hat: 2 without a fix

Attack profile from CVSS 3.1 · CNA. Fix status from CNA, GitHub and Red Hat. Impact type from CWE-248.

Summary

The multer middleware for Node.js from 2.0.0 before 2.5.0 can be crashed by one upload request. An aborted request while an asynchronous fileFilter is pending leaves a torn-down parser stream that emits an error with no listener, which makes Node.js exit the process. An unauthenticated remote attacker needs only one request, and applications are affected whatever their storage engine. The weakness is CWE-248.

Written with Claude Haiku 5.5 from the sources below · 2026-10-30

Description from the CNA

multer is a middleware for Node.js that handles multipart/form-data file uploads. In versions from 2.0.0 before 2.5.0, when multer is configured with an asynchronous fileFilter, a single request can crash the Node.js process. If the request is aborted while one file's asynchronous fileFilter is still pending, the pending callback later resumes a parsing stream that multer has already torn down, and the underlying parser emits an error on a stream that no longer has an error listener, which Node raises as an unhandled error event so the process exits. Any application using multer with an asynchronous fileFilter is affected regardless of storage engine, while uploads using a synchronous fileFilter are not affected. The issue is fixed in multer 2.5.0, and users should upgrade to 2.5.0 or later. As a workaround, use a synchronous fileFilter.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00442 38th percentileScored 2026-11-07
Fix Partial multer (multer): 2.5.0multer (npm): 2.5.0Red Hat: 2 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
expressjsmulter2.0.0 to before 2.5.02.5.0Patch availableCNA
—multer (npm)2.0.0 to before 2.5.02.5.0Patch availableGHSA-q7qp-rjg7-q26m
  • multer Vendorexpressjs Affected 2.0.0 to before 2.5.0 Fixed in 2.5.0 Patch available CNA
  • multer (npm) Vendor— Affected 2.0.0 to before 2.5.0 Fixed in 2.5.0 Patch available GHSA-q7qp-rjg7-q26m

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPEVersionsRoleVendor
cpe:2.3:a:expressjs:multer:*:*:*:*:*:*:*:*——expressjs
  • cpe:2.3:a:expressjs:multer:*:*:*:*:*:*:*:* Versions — — ·expressjs

Remediation

Upgrade the npm package multer to 2.5.0 or later, which fixes the issue. As a workaround, use a synchronous fileFilter. Red Hat lists no available fix plan for Red Hat Developer Hub 1 and Self-service automation portal 2.

Written with Claude Haiku 5.5 from the sources below · 2026-10-30

  • Fix · CNA multer (multer) Fixed in 2.5.0
  • Fix · GHSA-q7qp-rjg7-q26m multer (npm) Fixed in 2.5.0 Advisory →

Vendor assessments

Red Hat

Red Hat rating: Important. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Developer Hub 1AffectedNo fix yet
Self-service automation portal 2AffectedNo fix yet
Not affected: 1 product
  • Red Hat 3scale API Management Platform 2

Timeline

  1. 2026-10-22 Threatist record created from CVE-2026-113872
  2. 2026-10-22 CISA SSVC decision points changed
  3. 2026-10-22 Priority changed: MEDIUM → LOW
  4. 2026-10-23 Affected versions changed · Red Hat
  5. 2026-10-23 CVSS score added · Red Hat
  6. 2026-10-23 Alias added: GHSA-q7qp-rjg7-q26m
  7. 2026-10-23 Fix available: npm/[email protected] · GHSA-q7qp-rjg7-q26m
  8. 2026-10-23 CVSS score added · GHSA-q7qp-rjg7-q26m
  9. 2026-10-23 Weakness changed · GHSA-q7qp-rjg7-q26m
  10. 2026-10-23 6 new references · GHSA-q7qp-rjg7-q26m
  11. 2026-10-27 Affected versions changed · Red Hat
  12. 2026-10-30 Affected versions changed · Red Hat

References

Advisory 1

Other 5

  • TI-2024-08602 Open redirect in expressjs express CVSS 3.1MEDIUM 4.7
  • TI-2026-03033 Multer vulnerable to Denial of Service via uncontrolled recursion CVSS 4.0HIGH 8.7
  • TI-2026-02853 Multer vulnerable to Denial of Service via incomplete cleanup CVSS 4.0HIGH 8.7
  • TI-2026-01995 Multer vulnerable to Denial of Service via resource exhaustion CVSS 4.0HIGH 8.7
  • TI-2025-31125 Multer vulnerable to Denial of Service via unhandled exception CVSS 4.0HIGH 8.7
  • TI-2025-30337 Multer vulnerable to Denial of Service from maliciously crafted requests CVSS 3.1HIGH 7.5
See all 21 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences