node-csv: Prototype replacement still reachable via columns path
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- —
- Confidentiality · integrity · availability
- None · Low · Low
- Fix status
- Partial Red Hat: 2 without a fix
Attack profile from CVSS 4.0 · CNA. Fix status from CNA, GitHub and Red Hat.
Summary
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.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- Yes
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| adaltas | node-csv | before 7.0.2 | 7.0.2 | Patch available | CNA |
| — | csv-parse (npm) | before 7.0.2 | 7.0.2 | Patch available | GHSA-8cw4-87c7-c6xx |
- node-csv Vendoradaltas Affected before 7.0.2 Fixed in 7.0.2 Patch available CNA
- csv-parse (npm) Vendor— Affected before 7.0.2 Fixed in 7.0.2 Patch available GHSA-8cw4-87c7-c6xx
Remediation
- Fix · CNA node-csv (adaltas) Fixed in 7.0.2
- Fix · GHSA-8cw4-87c7-c6xx csv-parse (npm) Fixed in 7.0.2 Advisory →
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Fuse 7 | Affected | No fix planned: Out of support scope |
| Self-service automation portal 2 | Affected | No fix yet: Fix deferred |
Not affected: 2 products
- Red Hat Developer Hub 1
- Red Hat Hardened Images
Timeline
- 2026-10-02 Threatist record created from CVE-2026-85063
- 2026-10-03 Alias added: GHSA-8cw4-87c7-c6xx
- 2026-10-27 Affected versions changed · Red Hat
References
More adaltas vulnerabilities
- TI-2021-09842 In Node.js mixme, prior to v0.5.1, an attacker can add or alter properties of an object… CVSS 3.1CRITICAL 9.1
- TI-2026-49914 backmeup (npm) - OS Command Injection via Backup Option Values CVSS 3.1HIGH 8.8
- TI-2021-06050 Regular expression denial of service (ReDoS) in printf CVSS 3.1HIGH 7.5
Sources
- CVE-2026-85063 · CVE Program
- CVE-2026-85063 · NVD
- FIRST EPSS
- GHSA-8cw4-87c7-c6xx · GitHub Advisory Database · CC BY 4.0
- CVE-2026-85063 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences