CVE-2026-101898 Axios: HTTP/2 adapter bypasses configured DNS lookup and proxy controls
Attackers can bypass configured proxy and DNS lookup policies in Axios HTTP/2 requests, potentially accessing internal resources or evading network controls.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-101898?
CVE-2026-101898 is a high-severity server-side request forgery vulnerability in axios, published on 28 Sep 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. From 1.13.0 until 1.20.0, Axios HTTP/2 request setup does not consistently apply proxy settings and caller-supplied DNS lookup policy. An HTTPS request uses httpVersion: 2 with explicit config.proxy or environment-derived proxy settings, or relies on caller-supplied config.lookup DNS policy. The HTTP/2 path can connect without the configured proxy behavior or without applying the caller-supplied config.lookup policy before http2.connect(). Requests can bypass the intended proxy route or the caller-supplied DNS resolution policy. This issue is fixed in version 1.20.0.
Weakness: CWE-918
Which versions are affected by CVE-2026-101898?
2 open source packages ship an affected version, including axios.
| Package | Affected | Fixed in |
|---|---|---|
axios npm | From 1.13.0 | 1.20.0 |
axios npm | From 1.13.0 | 1.20.0 |
How do I fix CVE-2026-101898?
Upgrade axios to 1.20.0 or later.
Upgrade, and send outbound requests through an allow-list that blocks internal addresses. More about Server-side request forgery.
Is CVE-2026-101898 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-101898 exists.
Sources
Also known as CLEANSTART-2026-TR55390, CLEANSTART-2026-XT17463, CLEANSTART-2026-YE85588, CLSA-2026-1791798720, CLSA-2026-1791814903, DEBIAN-CVE-2026-101898 and 16 more.