Medium 6.9Published Sep 3, 2026

CVE-2026-85063node-csv: Prototype replacement still reachable via columns path

Updated under an hour ago (2026-10-19 09:50 UTC)

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It affects adaltas node-csv. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for adaltas node-csv

Exploited in the last 30 days

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: 6.9 MEDIUM (v4.0, CNA)CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N
Weakness (CWE): CWE-1321
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Deferred
Record last updated: Sep 4, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

adaltas node-csv adaltas:node_csv (from the name)	before 7.0.2	CNA record

References

https://github.com/adaltas/node-csv/security/advisories/GHSA-8cw4-87c7-c6xxx-refsource-confirm
https://github.com/adaltas/node-csv/issues/496x-refsource-misc
https://github.com/adaltas/node-csv/pull/497x-refsource-misc
https://github.com/adaltas/node-csv/commit/eb4d1484589c976dcb977db8dd0b90e015a6f66ex-refsource-misc

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.