Prototype pollution in axios - CVE-2026-101902
Published: September 17, 2026 / Updated: September 29, 2026
Vulnerability identifier: #VU150718
CSH Severity: Medium
CVSS v4: 8.2 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-101902
CWE-ID: CWE-1321
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to perform unintended state-changing HTTP requests.
The vulnerability exists due to improper handling of inherited object prototype properties in Axios default-instance request dispatch when processing requests that omit an explicit method. A remote attacker can exploit a separate prototype-pollution vulnerability to set Object.prototype.method and alter the HTTP method used for the request.
Only default-instance axios.request({ url }) and axios({ url }) calls without an own method are affected by the confirmed method path.
Affected software
axios
How to mitigate CVE-2026-101902
Install security update from vendor's website.
axios - addressed in versions 0.34.0, 1.20.0