CVE-2026-101902

Axios: Prototype-Pollution Gadget in the Default Instance Allows Inherited Object.prototype.method to Override HTTP Method

MEDIUM
6.9
CVSS Score
Published: September 28, 2026 at 05:22 PM UTC
Updated: September 30, 2026 at 07:38 PM UTC
1 product affected across 1 vendorAxios

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Severity
MEDIUM6.9
Exploit prediction
EPSS 0.4%
SSVC
PoC

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < 0.34.0v < 1.20.0
Affected range stops below 0.34.0, so it looks safe — our inference, not a vendor statement
Affected range stops below 1.20.0, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

SSVC — Action Prioritization

SSVCPoCAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

6.9MEDIUMGitHub_M
Vector?

Quick Info

StatusUNDERGOING ANALYSIS
CWE
CWE-1321

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