Multer aborted uploads leave orphaned disk files
Direct answer
Multer aborted uploads leave orphaned disk files, also tracked as CVE-2026-88932 / multer orphaned disk DoS is a high-severity threat campaign HOL Guard tracked from Sep 14, 2026 to Sep 16, 2026, verified against 3 primary sources and last reviewed Sep 20, 2026. Active tracking has ended and the record remains published as a permanent historical research record.
multer 2.2.0–2.3.0 on disk storage can leave orphaned files when a multipart upload is aborted after multer's abort cleanup already ran, so repeated abort storms fill the disk. Upgrade to multer 2.4.0. This is a follow-on class after earlier abort-handling work, not the same bug as the prior 5038-era fix alone.
Also tracked as CVE-2026-88932 · multer orphaned disk DoS
- First observed
- Sep 14, 2026
- Last observed
- Sep 16, 2026
- Last reviewed
- Sep 20, 2026
- Tracking ended
- Sep 16, 2026
Record exports
Uncertainty and limitations
Read the evidence limits before acting on this record.
Only disk-storage configurations are implicated; memory storage is out of scope. Whether your reverse proxy aborts mid-body affects exploitability.
- Only affects disk-storage multer deployments.
- Earlier abort-handling fixes do not automatically imply 2.4.0 is installed — check the resolved npm version.
- Blog-only promote day; company social may have been deferred under feed spacing.
Guard coverage and policy
What Guard's reviewed assertions do and do not claim for this campaign, and the reviewed starting points for defense.
No Guard coverage mapping or campaign-specific policy guidance is published for this record.
Safe next step. Campaign guidance is defensive context. It does not auto-apply policy or claim universal campaign coverage.
Timeline
Reviewed events, oldest first, each tied to a verified source.
- Disclosure
CVE-2026-88932 / GHSA-3pph-fpjx-jg34 disclosed for multer orphaned disk writes on aborted uploads.
Sources:GitHub Security Advisory GHSA-3pph-fpjx-jg34·OpenJS Foundation CNA advisories
- Vendor action
Fixed in multer 2.4.0 per maintainer advisory.
- Update
HOL Guard published the operator blog for CVE-2026-88932 (blog-only social day under feed spacing).
Source:HOL Guard operator write-up
Publication clock: 148.0 hours from reviewed disclosure timestamp to HOL publication; 24-hour high target; historical backfill outside target.
Reviewed artifacts
The specific artifacts this record concerns, as reviewed. Names and versions are shown as text; a registry link is not recorded here.
multer@>=2.2.0 <2.4.0npmpackage
Sources
Every claim on this record is traceable to the sources below.
Campaign questions, answered
multer 0 on disk storage can leave orphaned files when a multipart upload is aborted after multer's abort cleanup already ran, so repeated abort storms fill the disk. HOL Guard tracked the campaign from Sep 14, 2026 to Sep 16, 2026.
No. Active tracking ended Sep 16, 2026; this page remains as a labeled historical research record and does not imply the threat is currently active.
The record cites 3 primary sources, names 1 reviewed artifact, and was last fully reviewed Sep 20, 2026 by HOL Guard Security Publishing. Its uncertainty and limitations are stated on the record itself.
Campaign guidance is defensive context. It does not auto-apply policy or claim universal campaign coverage.
The permalink above is permanent. The full record can be downloaded from this page as JSON, an artifact CSV, and a STIX 2.1 bundle, and corrections can be requested through the published correction path on the record. Only disk-storage configurations are implicated; memory storage is out of scope. Whether your reverse proxy aborts mid-body affects exploitability.
Reviewed in full by HOL Guard Security Publishing.
- Published
- Last full review
- Last modified
Record HGTC-2026-1056B266