CVE-2026-85063

MEDIUMPre-NVD 6.96.9—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 6.9 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.3%, top 74% 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
Elevated
6.9EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 6.9Exploit: Elevated riskExposed: 0

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

node-csv is a full-featured CSV parser with a simple API that is tested against large datasets. Prior to 7.0.2, csv-parse with the columns and group_columns_by_name options enabled treats a duplicate __proto__ header as an existing property in packages/csv-parse/lib/api/index.js, assigns an attacker-controlled array through obj['__proto__'], and replaces the parsed record object's prototype. A malicious CSV header can therefore inject inherited array values into the returned record, hide those inherited values from JSON serialization, and affect property enumeration and type or shape checks in applications that process the record. This issue is fixed in version 7.0.2.

CVSS v3
6.9
EG Score
6.9(medium)
EG Risk
62(Attend)
EG Risk 62/100SSVC: Attend

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
Severity69% × 45%
Exploitation40% × 40%
Automatability100% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS PROB
0%
EPSS %ILE
26%
KEV
Not listed

Published

September 3, 2026

Last Modified

September 9, 2026

Advisory Details (4)

Auto-updated Sep 3, 2026
Patch available. Sources: github, github_pr, github_commit.
github_commit

commit eb4d1484589c (adaltas/node-csv)

Fix landed in adaltas/node-csv commit eb4d1484589c — awaiting tagged release

https://github.com/adaltas/node-csv/commit/eb4d1484589c976dcb977db8dd0b90e015a6f66e
github_pr

fix(csv-parse): prototype replacement reachable via columns path (#496)

Fix merged in adaltas/node-csv PR #497 on 2026-08-02 — awaiting tagged release

https://github.com/adaltas/node-csv/pull/497
generic

csv-parse: prototype replacement still reachable via `columns` path (incomplete fix of #479) · Issue #496 · adaltas/node-csv · GitHub

https://github.com/adaltas/node-csv/issues/496
github Patch Available

Prototype replacement still reachable via columns path · Advisory · adaltas/node-csv · GitHub

Affected: 7.0.2 (Object.hasOwn duplicate check + Object.defineProperty assignment).

https://github.com/adaltas/node-csv/security/advisories/GHSA-8cw4-87c7-c6xx

Vendor Advisories for CVE-2026-85063(1)

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

Affected Packages

(2 across 2 ecosystems)
Debian:14(1)
PackageVulnerable rangeFixed inDependents
node-csv-parse6.0.0-1, 6.1.0-1, 6.1.0-2——
npm(1)
PackageVulnerable rangeFixed inDependents
csv-parse—7.0.2—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 12× in last 7d / 29× 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. 2026-09-19 21:00 UTCEG score recompute
  2. 2026-09-18 21:23 UTCEG score recompute
  3. 2026-09-18 19:28 UTCEPSS rescore
  4. 2026-09-17 20:33 UTCEG score recompute
  5. 2026-09-17 19:32 UTCEPSS rescore
  6. 2026-09-16 18:33 UTCEG score recompute
  7. 2026-09-16 14:09 UTCEPSS rescore
  8. 2026-09-16 05:15 UTCEPSS rescore
  9. 2026-09-15 18:51 UTCEG score recompute
  10. 2026-09-15 03:12 UTCEPSS rescore
  11. 2026-09-15 03:12 UTCEPSS rescore
  12. 2026-09-13 19:38 UTCEG score recompute
  13. 2026-09-12 20:01 UTCEG score recompute
  14. 2026-09-11 20:24 UTCEG score recompute
  15. 2026-09-11 14:53 UTCEPSS rescore
  16. 2026-09-11 14:53 UTCEPSS rescore
  17. 2026-09-10 20:47 UTCEG score recompute
  18. 2026-09-08 23:06 UTCEG score recompute
  19. 2026-09-08 22:01 UTCEPSS rescore
  20. 2026-09-07 17:30 UTCEG score recompute
  21. 2026-09-06 17:54 UTCEG score recompute
  22. 2026-09-06 13:48 UTCEPSS rescore
  23. 2026-09-05 18:18 UTCEG score recompute
  24. 2026-09-05 15:31 UTCEPSS rescore
  25. 2026-09-04 18:41 UTCEG score recompute
Show 4 more
  1. 2026-09-04 17:52 UTCEG score recompute
  2. 2026-09-03 21:21 UTCEG score recompute
  3. 2026-09-03 20:39 UTCEG score recompute
  4. 2026-09-03 20:38 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-85063?
CVE-2026-85063 is a medium vulnerability published on September 3, 2026. node-csv is a full-featured CSV parser with a simple API that is tested against large datasets. Prior to 7.0.2, csv-parse with the columns and groupcolumnsby_name options enabled treats a duplicate proto header as an existing property in packages/csv-parse/lib/api/index.js, assigns an…
When was CVE-2026-85063 disclosed?
CVE-2026-85063 was first published in the National Vulnerability Database on September 3, 2026, with the most recent update on September 9, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-85063 actively exploited?
CVE-2026-85063 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 74.1% of all scored CVEs.
What is the CVSS score of CVE-2026-85063?
CVE-2026-85063 has a CVSS v3 base score of 6.9 (NVD).
How do I remediate CVE-2026-85063?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-85063, 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

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