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VulnerabilityPublished Updated

CVE-2026-9673: json-2-csv · CSV Injection

Affects json-2-csvSource CVE Database V5

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Public exploit available · CVSS 7.0 High : upgrade to 5.5.11 as a priority.

Data as of 30 Oct 2026, 11:52 UTC

CVSS 4.0 base score
7.0High
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.1% chance of exploitation in 30 days – higher than 5% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 5.5.11
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N/E:P

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 28 May 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: evidence found.

    CVSS exploit maturity: proof of concept public

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), CVSS vector, the Metasploit, Exploit-DB and nuclei-templates index as of 30 Oct 2026.

What to do

Upgrade json-2-csv to 5.5.11.

Affected software

ProductAffectedFixed in
json-2-csvAffected
  • >=3.15.0 <5.5.11
Fixed in
  • 5.5.11
org.webjars.npm:json-2-csvAffected
  • All versions
Fixed in–
npmjson-2-csvpkg:npm/json-2-csvOther threatsAffected
  • =3.15.0
Fixed in–

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

Description

Versions of the package json-2-csv from 3.15.0 and before 5.5.11 are vulnerable to CSV Injection via the preventCsvInjection option which can be bypassed. An attacker can inject formulas into CSV files, which execute when the files are opened in spreadsheet applications.

References

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