SB2026091565 - Incomplete cleanup in multer
Published: September 15, 2026
Security Bulletin ID
SB2026091565
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Partial DoS
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Incomplete cleanup (CVE-ID: CVE-2026-88932)
CWE-ID: CWE-459 - Incomplete cleanup
CVSSv4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to incomplete cleanup in multer's diskStorage when handling aborted multipart uploads before a file path is assigned. A remote attacker can send aborted upload requests to accumulate orphaned files and exhaust disk space.
An asynchronous destination or filename configuration widens the exposure window.
Remediation
Install update from vendor's website.