CVE-2026-42036 Axios: HTTP adapter streamed responses bypass maxContentLength
Attackers can cause resource exhaustion by bypassing response size limits when streaming responses, requiring developers to upgrade the library.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-42036?
CVE-2026-42036 is a medium-severity denial of service vulnerability in axios, published on 24 Apr 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Axios is a promise based HTTP client for the browser and Node.js. Prior to 1.15.1 and 0.31.1, when responseType: 'stream' is used, Axios returns the response stream without enforcing maxContentLength. This bypasses configured response-size limits and allows unbounded downstream consumption. This vulnerability is fixed in 1.15.1 and 0.31.1.
Weakness: CWE-770
Which versions are affected by CVE-2026-42036?
4 open source packages ship an affected version, including axios. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
axios npm | All versions | 0.31.1 |
axios npm | All versions | 0.31.1 |
axios npm | From 1.0.0 | 1.15.1 |
axios npm | From 1.0.0 | 1.15.1 |
Products include Axios Axios.
How do I fix CVE-2026-42036?
Upgrade axios to a fixed version for your release line: 0.31.1 or 1.15.1.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2026-42036 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-42036 exists.
Other vulnerabilities in axios
- CVE-2026-44494 Axios: Full Man-in-the-Middle via Prototype Pollution Gadget in `config.proxy`
- CVE-2026-44492 axios's shouldBypassProxy does not recognize IPv4-mapped IPv6 addresses, allowing NO_PROXY bypass (incomplete fix for CVE-2025-62718)
- CVE-2026-67320 axios before 0.33.0 Prototype Pollution via Node HTTP adapter
- CVE-2026-44487 Axios: Proxy-Authorization Credential Leak to Origin Server Across HTTP-to-HTTPS Redirect in Axios Node.js HTTP Adapter
- CVE-2025-27152 Possible SSRF and Credential Leakage via Absolute URL in axios Requests
Sources
Also known as CLEANSTART-2026-CF31856, CLEANSTART-2026-DC50451, DEBIAN-CVE-2026-42036, ECHO-675c-1a43-6f9d, GHSA-vf2m-468p-8v99, MINI-2h6g-6r6h-vr46 and 20 more.