CVE-2026-5038
MEDIUMCVSS v3.1: 5.3 · EPSS: 0.0025 (15.7 percentile)
Source data as of:
At a glance
- Severity
- MEDIUM
- CVSS
- 5.3 v3.1 · NVD
- EPSS
- 0.0025 (15.7 percentile) · FIRST.org
- CISA KEV
- No
- Attack conditions (CVSS vector)
- NetworkNo privilegesNo user interaction · Source: NVD Vector
- Affected vendors
- expressjs
- Published
- 2026-06-15 · Modified: 2026-06-16
- References
- Jump to references (2)
CVSS / EPSS / KEV
Source — CVSS: NVD · EPSS: FIRST.org · KEV: CISA. Data & Sources
Description
Impact: multer versions 2.0.0-alpha.1 through 2.1.1 and 3.0.0-alpha.1 are vulnerable to a Denial of Service when using diskStorage. Aborted or malformed multipart uploads leave orphaned partial files on disk because the Readable.pipe() call does not propagate the stream destroy signal to the underlying fs.WriteStream. An attacker can exhaust disk space by triggering many aborted uploads, with no application bug required. Patches: Users should upgrade to multer 2.2.0 (2.x line) or 3.0.0-alpha.2 (3.x prerelease). Both versions track in-flight write streams and clean them up on the abort path. Workarounds: None.
References
Reference URLs as listed by NVD, grouped by a mechanical match on the link's host/pattern. Labels describe the link type only.
- Vendor advisory https://cna.openjsf.org/security-advisories.html
- Vendor advisory https://github.com/expressjs/multer/security/advisories/GHSA-3p4h-7m6x-2hcm