CVE-2026-67319

axios before 0.33.0 (and 1.x before 1.18.0) can consume inherited properties from nested request option objects when the JavaScript process's Object.prototype has already been polluted by another component. While the top-level merged config uses a null prototype, nested plain objects such as auth and paramsSerializer are cloned into ordinary objects and read without own-property checks. When an application passes placeholder nested objects such as auth: {} or paramsSerializer: {}, inherited username/password values can cause silent injection of an Authorization: Basic header, and inherited encode/serialize values can alter query-string serialization (full serializer replacement requires a function-valued pollution primitive). This is exploitable only in the presence of pre-existing prototype pollution.

CVSS v3 3.7 LOW

3.7^/10

CVSS v3 : LOW

Vector :

Exploitability : 2.2 / Impact : 1.4

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact LOW

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://github.com/axios/axios/security/advisories/GHSA-7q8q-rj6j-mhjq	Exploit Mitigation Vendor Advisory
https://www.vulncheck.com/advisories/axios-before-prototype-pollution-via-nested-option-objects	Third Party Advisory
https://github.com/axios/axios/security/advisories/GHSA-7q8q-rj6j-mhjq	Exploit Mitigation Vendor Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:axios:axios::::::node.js::*
	cpe:2.3:a:axios:axios::::::node.js::*

History

No history.

Information

Published : 2026-08-01 13:17

Updated : 2026-09-01 15:39

NVD link : CVE-2026-67319

Mitre link : CVE-2026-67319

CVE.ORG link : CVE-2026-67319

JSON object : View

Products Affected

axios

axios

CWE

CWE-1321

Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')

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