Security readout for executives and security teams
Plain-English summary
CVE-2026-9673 affects json-2-csv CSV export handling. Its CSV injection protection can be bypassed, allowing hostile spreadsheet formulas to be written into exported CSV files. Risk appears when users open those files in spreadsheet applications. This is most relevant to products that export user-controlled data to CSV.
Executive priority
Prioritize remediation for customer-facing or employee-facing CSV export features. This is high risk where exported data is opened in spreadsheets, but sources do not show active exploitation. Treat as a near-term dependency update and workflow-safety issue rather than an emergency server compromise scenario.
Technical view
json-2-csv versions from 3.15.0 and before 5.5.11 are reported vulnerable to CWE-1236 CSV Injection via bypass of the preventCsvInjection option. The CVE and Snyk sources describe formula injection into generated CSV output, with execution occurring when opened by spreadsheet software. A referenced commit appears associated with the fix.
Likely exposure
Applications, APIs, or internal tools using json-2-csv or org.webjars.npm:json-2-csv to export untrusted or user-controlled fields into CSV may be exposed. Highest concern is workflows where employees, analysts, customers, or administrators open exported CSV files in spreadsheet applications.
Exploitation context
Sources do not indicate CISA KEV listing or confirmed active exploitation. Exploitation requires attacker-controlled data reaching CSV output and a victim opening the file in a spreadsheet application. The business impact is downstream user compromise or data manipulation through spreadsheet formula behavior, not direct server code execution.
Researcher notes
Evidence is centered on Snyk, the CVE record, a proof reference, and an upstream commit. The CVSS vector in the provided bundle rates this high at 7.0. Validate exact fixed behavior against upstream release notes or commit history because the bundle identifies vulnerable range but provides limited implementation detail.
Mitigation direction
- Upgrade json-2-csv to 5.5.11 or later where applicable.
- Update org.webjars.npm:json-2-csv if used through Java/WebJars packaging.
- Review vendor advisories and the referenced fix commit before rollout.
- Treat CSV exports containing untrusted input as unsafe until updated.
- Warn users not to open suspicious exported CSV files in spreadsheet applications.
Validation and detection
- Search SBOMs, lockfiles, and package manifests for json-2-csv.
- Identify versions from 3.15.0 through before 5.5.11.
- Check Java/WebJars dependencies for org.webjars.npm:json-2-csv.
- Map CSV export paths that include user-controlled fields.
- Confirm updated builds no longer use vulnerable dependency versions.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-1236: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2026-9673 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- High
- CVSS
- 7 (4.0)
- Known Exploited
- No
- Published
Vector: 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
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
SSVC decision data
CVSS vector scores
2 official scoresWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
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——snykCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N/E:P2.54.2snykVulnerability scoring details
Base CVSS 4.0 score
7HighVector: 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
Base CVSS 3.1 score
6.8MediumVector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N/E:P
Vulnerability timeline
Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.
- CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
- CVE publishedCVE Program
The CVE record was published.
- CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
ADP provider summaries
Source materials
- CVE List V5 sourceCVE List V5
- https://security.snyk.io/vuln/SNYK-JS-JSON2CSV-14221326CVE reference, snyk
- https://security.snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-17115116CVE reference, snyk
- https://github.com/mrodrig/json-2-csv/blob/main/src/json2csv.ts%23L410CVE reference, snyk
- https://gist.github.com/whoamins/299745a2d36b482b44e9613b78e40613CVE reference, snyk
- https://github.com/mrodrig/json-2-csv/commit/0fdd0bb6d0273178cd940afc323ccbce19688229CVE reference, snyk
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Improper Neutralization of Formula Elements in a CSV File
Improper Neutralization of Formula Elements in a CSV File represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.