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Description

n8n before 2.28.0 (and before 1.123.58 on the 1.x branch) contains a disk space exhaustion vulnerability in the data-table file upload endpoint. The per-request quota check does not account for files already written to the shared temporary directory, allowing an authenticated user to repeatedly upload files that accumulate on disk until the periodic cleanup runs, potentially exhausting available disk space on the host.

PUBLISHED Reserved 2026-07-01 | Published 2026-07-10 | Updated 2026-07-10 | Assigner VulnCheck




MEDIUM: 5.3CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N

Problem types

Allocation of Resources Without Limits or Throttling

Product status

Default status
unaffected

Any version before 2.28.0
affected

2.28.0 (semver)
unaffected

Default status
unaffected

Any version before 1.123.58
affected

1.123.58 (semver)
unaffected

Credits

CodeByMoriarty reporter

References

github.com/...io/n8n/security/advisories/GHSA-w867-jm58-p9pv (GitHub Security Advisory (GHSA-w867-jm58-p9pv)) vendor-advisory

www.vulncheck.com/...ion-via-data-table-file-upload-endpoint (VulnCheck Advisory: n8n - Disk Space Exhaustion via Data-Table File Upload Endpoint) third-party-advisory

cve.org (CVE-2026-58661)

nvd.nist.gov (CVE-2026-58661)

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