Multer aborted uploads leave orphaned disk files
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
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.
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.
- 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).
Publication clock: 148.0 hours from reviewed disclosure timestamp to HOL publication; 24-hour high target; historical backfill outside target.
Guard coverage and non-coverage
What Guard's reviewed coverage assertions do and do not claim for this campaign.
No Guard coverage mapping is published for this record.
Defensive policy guidance
Reviewed starting points for defending against this campaign's artifact classes.
No campaign-specific policy guidance is published.
Reviewed artifacts and indicators
Published values are defanged (for example hxxps and [.] blocks) so nothing here is copy-paste executable.
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.
Reviewed in full by HOL Guard Security Publishing.
- Published
- Last full review
- Last modified
Record HGTC-2026-1056B266.