CVE-2026-101902 Axios: Prototype-Pollution Gadget in the Default Instance Allows Inherited Object.prototype.method to Override HTTP Method
Prototype pollution gadget in Axios allows attackers to override HTTP methods if Object.prototype is polluted, potentially causing unintended state-changing requests.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-101902?
CVE-2026-101902 is a medium-severity 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 0.27.2 until 0.34.0 and 1.20.0, Axios default-instance requests that omit an explicit method can read an inherited method value from Object.prototype. If another vulnerability in the same process pollutes Object.prototype.method, calls such as axios.request({ url }) and axios({ url }) can send a state-changing HTTP method instead of the expected default GET. Axios does not create the prototype pollution source. This is a read-side gadget in axios request dispatch. This issue is fixed in version 0.34.0 and 1.20.0.
Weakness: CWE-1321
Which versions are affected by CVE-2026-101902?
4 open source packages ship an affected version, including axios.
| Package | Affected | Fixed in |
|---|---|---|
axios npm | From 0.27.2 | 0.34.0 |
axios npm | From 0.27.2 | 0.34.0 |
axios npm | From 1.0.0 | 1.20.0 |
axios npm | From 1.0.0 | 1.20.0 |
How do I fix CVE-2026-101902?
Upgrade axios to a fixed version for your release line: 0.34.0 or 1.20.0.
Is CVE-2026-101902 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-101902 exists.
Sources
Also known as AZL-105245, CLEANSTART-2026-CB38502, CLEANSTART-2026-YP57972, DEBIAN-CVE-2026-101902, ECHO-6bca-9fdf-e5cd, GHSA-9fr6-4gfg-395g and 19 more.