node-csv: Prototype replacement still reachable via columns path
Impact
With columns: true and group_columns_by_name: true, a duplicated proto header causes the duplicate-column branch to assign an array to obj['proto'], invoking the proto setter and replacing the parsed record object's prototype with attacker-controlled data. Fixed in 7.0.2 (Object.hasOwn duplicate check + Object.defineProperty assignment).
Patches
The problem been patched.
Workarounds
Disable usage of both the columns and group_columns_by_name options.
References
issue #496, PR #497
Affected software
Click a technology to see all vulnerabilities affecting it.
| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| npm package | csv-parse | < 7.0.2 | 7.0.2 |
References
- https://github.com/adaltas/node-csv/security/advisories/GHSA-8cw4-87c7-c6xx
- https://nvd.nist.gov/vuln/detail/CVE-2026-85063
- https://github.com/adaltas/node-csv/issues/496
- https://github.com/adaltas/node-csv/pull/497
- https://github.com/adaltas/node-csv/commit/eb4d1484589c976dcb977db8dd0b90e015a6f66e
- https://github.com/adaltas/node-csv
- CVSS vector
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- Platform
- npm
- Package
csv-parse- Disclosed
- 08.09.2026
- Updated
- 11.10.2026 10:22
Sources and licenses
OSV / GitHub Advisory Database - GHSA-8cw4-87c7-c6xx - CC BY 4.0
Vulnerability history: csv-parse
All published vulnerabilities of this package (npm package), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 2
- First → latest
- 10.2019 09.2026
- Without a fix
- 0
- Exploited in attacks
- 0
Severity breakdown
- High 1
- Medium 1
Disclosures per year
- 2019: 1
- 2020: 0
- 2021: 0
- 2022: 0
- 2023: 0
- 2024: 0
- 2025: 0
- 2026: 1
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node-csv: Prototype replacement still reachable via columns path this entry
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