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GHSA-8cw4-87c7-c6xx

MediumCVSS 6.9 / 10

Published Sep 8, 2026·Last modified Sep 8, 2026

Affected Components(1)

csv-parse

< 7.0.2

Description

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

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Risk Scores

Base Score

6.9

The vulnerability can be exploited over the network without needing physical access. It is easy for an attacker to exploit this vulnerability. An attacker does not need any special privileges or access rights. No user interaction is needed for the attacker to exploit this vulnerability.

Threat Intelligence

2.7

Limited exploitation activity has been observed. Close monitoring and planned remediation are recommended.

EPSS

0.33%

The exploit probability is very low. The vulnerability is unlikely to be exploited in the next 30 days.

Exploit

Not available

We did not find any exploit available. Neither in GitHub repositories nor in the Exploit-Database.

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