CVE-2026-5038

HIGHNVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 7.5 under NVD CVSS v3. EPSS exploit probability: 0.3%, top 80% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
7.5
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 7.5Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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.

CVSS v3
7.5
EG Score
7.5(medium)
EPSS
19.7%
KEV
Not listed

Published

June 15, 2026

Last Modified

June 16, 2026

Advisory Details (2)

Auto-updated Jun 15, 2026
Patch available. Sources: github.
github Patch Available

Multer vulnerable to Denial of Service via incomplete cleanup of aborted uploads · Advisory · expressjs/multer · GitHub

https://github.com/expressjs/multer/security/advisories/GHSA-3p4h-7m6x-2hcm
generic

Security Advisories | OpenJS Foundation CVE Numbering Authority

https://cna.openjsf.org/security-advisories.html

Vendor Advisories for CVE-2026-5038(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Affected Packages

(1 across 1 ecosystem)
npm(1)
PackageVulnerable rangeFixed inDependents
multer—3.0.0-alpha.2—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 22× in last 7d / 70× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-07-07 00:24 UTCEG score recompute
  2. 2026-07-06 16:27 UTCEPSS rescore
  3. 2026-07-06 16:27 UTCEPSS rescore
  4. 2026-07-06 02:23 UTCEPSS rescore
  5. 2026-07-06 02:23 UTCEPSS rescore
  6. 2026-07-06 00:40 UTCEG score recompute
  7. 2026-07-05 11:49 UTCEG score recompute
  8. 2026-07-05 02:31 UTCEPSS rescore
  9. 2026-07-05 02:30 UTCEPSS rescore
  10. 2026-07-04 23:00 UTCEG score recompute
  11. 2026-07-04 10:05 UTCEG score recompute
  12. 2026-07-04 06:31 UTCEPSS rescore
  13. 2026-07-04 06:31 UTCEPSS rescore
  14. 2026-07-03 14:18 UTCEG score recompute
  15. 2026-07-03 01:04 UTCEG score recompute
  16. 2026-07-02 12:15 UTCEG score recompute
  17. 2026-07-01 23:24 UTCEG score recompute
  18. 2026-07-01 15:07 UTCEPSS rescore
  19. 2026-07-01 10:34 UTCEG score recompute
  20. 2026-06-30 23:22 UTCEPSS rescore
  21. 2026-06-30 21:43 UTCEG score recompute
  22. 2026-06-30 08:54 UTCEG score recompute
  23. 2026-06-29 20:03 UTCEG score recompute
  24. 2026-06-29 14:06 UTCEPSS rescore
  25. 2026-06-29 07:13 UTCEG score recompute
Show 45 more
  1. 2026-06-28 18:18 UTCEG score recompute
  2. 2026-06-28 14:07 UTCEPSS rescore
  3. 2026-06-28 05:28 UTCEG score recompute
  4. 2026-06-28 04:56 UTCEPSS rescore
  5. 2026-06-27 16:38 UTCEG score recompute
  6. 2026-06-27 03:48 UTCEG score recompute
  7. 2026-06-27 03:08 UTCEPSS rescore
  8. 2026-06-26 14:59 UTCEG score recompute
  9. 2026-06-26 02:09 UTCEG score recompute
  10. 2026-06-25 13:49 UTCEPSS rescore
  11. 2026-06-25 13:19 UTCEG score recompute
  12. 2026-06-25 00:29 UTCEG score recompute
  13. 2026-06-24 14:05 UTCEPSS rescore
  14. 2026-06-24 11:39 UTCEG score recompute
  15. 2026-06-23 22:49 UTCEG score recompute
  16. 2026-06-23 21:33 UTCEPSS rescore
  17. 2026-06-23 21:33 UTCEPSS rescore
  18. 2026-06-23 09:59 UTCEG score recompute
  19. 2026-06-22 21:09 UTCEG score recompute
  20. 2026-06-22 14:25 UTCEPSS rescore
  21. 2026-06-22 14:25 UTCEPSS rescore
  22. 2026-06-22 08:11 UTCEG score recompute
  23. 2026-06-21 19:11 UTCEG score recompute
  24. 2026-06-21 14:56 UTCEPSS rescore
  25. 2026-06-21 14:56 UTCEPSS rescore
  26. 2026-06-21 06:20 UTCEG score recompute
  27. 2026-06-21 01:59 UTCEPSS rescore
  28. 2026-06-21 01:59 UTCEPSS rescore
  29. 2026-06-20 17:26 UTCEG score recompute
  30. 2026-06-20 04:33 UTCEG score recompute
  31. 2026-06-19 19:26 UTCEPSS rescore
  32. 2026-06-19 19:26 UTCEPSS rescore
  33. 2026-06-19 15:33 UTCEG score recompute
  34. 2026-06-19 02:41 UTCEG score recompute
  35. 2026-06-18 17:52 UTCEPSS rescore
  36. 2026-06-18 17:52 UTCEPSS rescore
  37. 2026-06-18 13:51 UTCEG score recompute
  38. 2026-06-18 00:55 UTCEG score recompute
  39. 2026-06-17 17:53 UTCEPSS rescore
  40. 2026-06-17 12:02 UTCEG score recompute▲ 2.20
  41. 2026-06-16 17:53 UTCEPSS rescore
  42. 2026-06-16 17:47 UTCNVD updateCVSS v3 → 7.5 · severity → HIGH
  43. 2026-06-16 14:04 UTCEG score recompute
  44. 2026-06-15 16:04 UTCEG score recompute
  45. 2026-06-15 16:03 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-5038?
CVE-2026-5038 is a high vulnerability published on June 15, 2026. 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…
When was CVE-2026-5038 disclosed?
CVE-2026-5038 was first published in the National Vulnerability Database on June 15, 2026, with the most recent update on June 16, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-5038 actively exploited?
CVE-2026-5038 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 19.7% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-5038?
CVE-2026-5038 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2026-5038?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-5038, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-5038

Explore →

Is Your Infrastructure Affected by CVE-2026-5038?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs