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.
CVE-2026-58661
MEDIUMPre-NVD 5.35.3—Trending — 4 sources updated this week
EchelonGraph scoreMEDIUM confidence
This medium-severity CVE scores 5.3 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.2%, top 86% 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, secondary
5.3
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
- Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 5.3Exploit: NoneExposed: 0
No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.
- CVSS v3
- 5.3
- EG Score
- 5.3(medium)
- EPSS
- 14.3%
- KEV
- Not listed
Published
July 10, 2026
Last Modified
July 10, 2026
Advisory Details (1)
Auto-updated Jul 10, 2026Patch available. Sources: github.
github Patch Available
Authenticated Users Can Exhaust Temporary Disk Storage via Data-Table File Uploads · Advisory · n8n-io/n8n · GitHub
https://github.com/n8n-io/n8n/security/advisories/GHSA-w867-jm58-p9pvVendor Advisories for CVE-2026-58661(1)
These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.
Weakness Classification(1)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 9× in last 7d / 9× 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.
- 2026-07-13 06:13 UTCEPSS rescore
- 2026-07-13 06:13 UTCEPSS rescore
- 2026-07-12 16:09 UTCEG score recompute
- 2026-07-12 16:09 UTCGHSA enrichment
- 2026-07-12 05:46 UTCEPSS rescore
- 2026-07-11 15:26 UTCEG score recompute
- 2026-07-11 15:25 UTCGHSA enrichment
- 2026-07-10 14:43 UTCEG score recompute
- 2026-07-10 14:42 UTCMITRE cvelistV5first tracked
Related CVEs(same CWE)
Frequently asked(5)
What is CVE-2026-58661?
CVE-2026-58661 is a medium vulnerability published on July 10, 2026. 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…
When was CVE-2026-58661 disclosed?
CVE-2026-58661 was first published in the National Vulnerability Database on July 10, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-58661 actively exploited?
CVE-2026-58661 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 14.3% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-58661?
CVE-2026-58661 has a CVSS v3 base score of 5.3 (NVD).
How do I remediate CVE-2026-58661?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-58661, 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
Explore the affected products and dependency analysis for CVE-2026-58661
Is Your Infrastructure Affected by CVE-2026-58661?
EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.