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

Quick assessment

Affected
adaltas node-csv
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

adaltas node-csv是adaltas组织的一个CSV解析与生成组件。 adaltas node-csv 7.0.2之前版本存在输入验证错误漏洞，该漏洞源于csv-parse在启用columns和group_columns_by_name选项时，将重复的__proto__标头视为已有属性，通过obj['__proto__']分配攻击者控制的数组并替换记录对象原型，可能导致恶意CSV标头注入继承的数组值，隐藏这些值不被JSON序列化，并影响属性枚举和类型或形状检查。

CVSS 6.9 · Medium EPSS 0.33% · P25

Possible ATT&CK Techniques 1 AI

T1204 · User Execution

Affected Version Matrix 1

VendorProduct Version RangeStatus
adaltas node-csv < 7.0.2 affected
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I. Basic Information for CVE-2026-85063

Vulnerability Information
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Vulnerability Title
node-csv: Prototype replacement still reachable via columns path
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
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
Source: CVE Program / CVE List V5
Vulnerability Type
CWE-1321
Source: CVE Program / CVE List V5
Vulnerability Title
adaltas node-csv 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
adaltas node-csv是adaltas组织的一个CSV解析与生成组件。 adaltas node-csv 7.0.2之前版本存在输入验证错误漏洞，该漏洞源于csv-parse在启用columns和group_columns_by_name选项时，将重复的__proto__标头视为已有属性，通过obj['__proto__']分配攻击者控制的数组并替换记录对象原型，可能导致恶意CSV标头注入继承的数组值，隐藏这些值不被JSON序列化，并影响属性枚举和类型或形状检查。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
adaltas node-csv < 7.0.2 -

II. Public POCs for CVE-2026-85063

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III. Intelligence Information for CVE-2026-85063

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Patches & Fixes for CVE-2026-85063 (2)

Vendor Advisories for CVE-2026-85063 (1)

Proof of Concept for CVE-2026-85063 (1)

IV. Related Vulnerabilities

Same vendor: adaltas
Same weakness: CWE-1321

V. Comments for CVE-2026-85063

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