CVE-2026-39414

MEDIUMNVD 6.56.5—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 6.5 under NVD CVSS v3. EPSS exploit probability: 0.5%, top 61% 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
Trending — 3 sources updated this week
6.5
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 6.5Exploit: NoneExposed: 0

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

MinIO is a high-performance object storage system. From RELEASE.2018-08-18T03-49-57Z to before RELEASE.2025-12-20T04-58-37Z, MinIO's S3 Select feature is vulnerable to memory exhaustion when processing CSV files containing lines longer than available memory. The CSV reader's nextSplit() function calls bufio.Reader.ReadBytes('\n') with no size limit, buffering the entire input in memory until a newline is found. A CSV file with no newline characters causes the entire contents to be read into a single allocation, leading to an OOM crash of the MinIO server process. This is exploitable by any authenticated user with s3:PutObject and s3:GetObject permissions. The attack is especially practical when combined with compression: a ~2 MB gzip-compressed CSV can decompress to gigabytes of data without newlines, allowing a small upload to cause large memory consumption on the server. However, compression is not required — a sufficiently large uncompressed CSV with no newlines triggers the same issue.

CVSS v3
6.5
EG Score
6.5(medium)
EG Risk
29(Track)
EG Risk 29/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity65% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS
38.9%
KEV
Not listed

Published

April 8, 2026

Last Modified

April 15, 2026

Advisory Details (3)

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

DoS via Unbounded Memory Allocation in S3 Select CSV Parsing · Advisory · minio/minio · GitHub

https://github.com/minio/minio/security/advisories/GHSA-h749-fxx7-pwpg
github_pr

Concurrent CSV parsing and reduce S3 select allocations

Fix merged in minio/minio PR #8200 on 2019-09-13 — awaiting tagged release

https://github.com/minio/minio/pull/8200
generic

Upgrade from open-source MinIO | MinIO AIStor Documentation

https://docs.min.io/enterprise/aistor-object-store/upgrade-aistor-server/community-edition

Vendor Advisories for CVE-2026-39414(1)

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

Patch Availability(1)

Vendor / EcosystemFixed in / PatchReleasedSource
gogithub.com/minio/minio—ghsa

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(1 across 1 ecosystem)
Go(1)
PackageVulnerable rangeFixed inDependents
github.com/minio/minio———

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 8× in last 7d / 35× 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. 2026-07-23 03:10 UTCEG score recompute
  2. 2026-07-22 14:08 UTCEPSS rescore
  3. 2026-07-21 15:24 UTCEPSS rescore
  4. 2026-07-20 21:02 UTCOSV refresh
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  23. 2026-06-15 05:34 UTCGHSA enrichment
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  28. 2026-06-11 20:46 UTCGHSA enrichment
  29. 2026-06-11 14:00 UTCEPSS rescore
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  32. 2026-06-10 11:44 UTCGHSA enrichment
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  36. 2026-06-08 07:29 UTCGHSA enrichment
  37. 2026-06-07 15:25 UTCEPSS rescore
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  40. 2026-06-07 09:00 UTCGHSA enrichment
  41. 2026-06-06 13:47 UTCEPSS rescore
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  71. 2026-05-20 18:16 UTCEG score recompute
  72. 2026-05-20 18:16 UTCGHSA enrichment
  73. 2026-05-20 11:22 UTCEPSS rescore
  74. 2026-05-20 11:22 UTCEPSS rescore

Related CVEs(same product + same CWE)

Frequently asked(5)

What is CVE-2026-39414?
CVE-2026-39414 is a medium vulnerability published on April 8, 2026. MinIO is a high-performance object storage system. From RELEASE.2018-08-18T03-49-57Z to before RELEASE.2025-12-20T04-58-37Z, MinIO's S3 Select feature is vulnerable to memory exhaustion when processing CSV files containing lines longer than available memory. The CSV reader's nextSplit() function…
When was CVE-2026-39414 disclosed?
CVE-2026-39414 was first published in the National Vulnerability Database on April 8, 2026, with the most recent update on April 15, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-39414 actively exploited?
CVE-2026-39414 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 38.9% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-39414?
CVE-2026-39414 has a CVSS v3 base score of 6.5 (NVD).
How do I remediate CVE-2026-39414?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-39414, 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.

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