CVE-2026-39865 Axios HTTP/2 Session Cleanup State Corruption Vulnerability
A malicious server can crash the Axios client process via concurrent HTTP/2 session closures due to state corruption in session cleanup logic.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-39865?
CVE-2026-39865 is a medium-severity vulnerability in axios, published on 8 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. Starting in version 1.13.0 and prior to 1.13.2, Axios HTTP/2 session cleanup logic contains a state corruption bug that allows a malicious server to crash the client process through concurrent session closures. The vulnerability exists in the Http2Sessions.getSession() method in lib/adapters/http.js. The session cleanup logic contains a control flow error when removing sessions from the sessions array. This vulnerability is fixed in 1.13.2.
Which versions are affected by CVE-2026-39865?
2 open source packages ship an affected version, including axios. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
axios npm | From 1.13.0 | 1.13.2 |
axios npm | From 1.13.0 | 1.13.2 |
Products include Axios Axios.
How do I fix CVE-2026-39865?
Upgrade axios to 1.13.2 or later.
Is CVE-2026-39865 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-39865 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 DEBIAN-CVE-2026-39865, GHSA-qj83-cq47-w5f8, MINI-884c-c5v4-6frp, MINI-9pgg-r6g3-2qg6, MINI-cx22-46w6-fqj6, MINI-ggvx-q7fx-qmc7 and 7 more.