6.9

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

Deferred
AliasesUBUNTU-CVE-2026-85063DEBIAN-CVE-2026-85063CGA-2wmm-2vq8-9296
Published 03-09-2026Last modified 04-09-2026

Vulnerability summary

CVE-2026-85063 is a medium (CVSS 6.9) vulnerability in adaltas node-csv. EPSS estimates a 0.57% chance of exploitation in the next 30 days, higher than 47% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 6.9, network access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
6.9/10
010
Medium · v4.0 (CVE.org)
EPSS score
0.57%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Timeline

  1. 03-09-2026
    PublishedVulnerability first disclosed.
  2. 04-09-2026
    Last modifiedVulnerability information updated.

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.

CVSS metrics

7 scores · 7 sources · 1 version

EPSS trend

Probability

0.57%

Chance of exploitation in the next 30 days

Percentile

47%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.57% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.

Chainguard5 products
  • langfuse-3-compat< 3.225.7-r6
  • langfuse-3-worker< 3.225.7-r4
  • langfuse-4-worker< 4.32.0-r4
  • langfuse-fips-3-worker< 3.225.7-r1
  • langfuse-fips-4-worker< 4.33.0-r1
Wolfi2 products
  • langfuse-3-compat< 3.225.7-r6
  • langfuse-3-worker< 3.225.7-r4
Adaltas1 product
Debian1 product
  • node-csv-parse< 6.1.0-2
Npm1 product
  • csv-parse< 7.0.2
Ubuntu1 product
  • node-csv-parseAll versions (No fix recorded)

6 vendors · 11 products

References

10 links