Axios <1.15.0 Prototype Pollution RCE via Gadget Attack
CVE-2026-40175 Published on April 10, 2026
Axios has Unrestricted Cloud Metadata Exfiltration via Header Injection Chain
Axios is a promise based HTTP client for the browser and Node.js. Versions prior to 1.15.0 and 0.3.1 are vulnerable to a specific gadget-style attack chain in which prototype pollution in a third-party dependency may be leveraged to inject unsanitized header values into outbound requests. This vulnerability is fixed in 1.15.0 and 0.3.1.
Vulnerability Analysis
CVE-2026-40175 can be exploited with network access, and does not require authorization privileges or user interaction. This vulnerability is consided to have a high level of attack complexity. Public availability of a proof of concept (POC) exploit exists for CVE-2026-40175. The potential impact of an exploit of this vulnerability is considered to be critical as this vulnerability has a high impact to the confidentiality, integrity and availability of this component.
Weakness Types
What is a HTTP Response Splitting Vulnerability?
The software receives data from an upstream component, but does not neutralize or incorrectly neutralizes CR and LF characters before the data is included in outgoing HTTP headers.
CVE-2026-40175 has been classified to as a HTTP Response Splitting vulnerability or weakness.
What is a HTTP Request Smuggling Vulnerability?
When malformed or abnormal HTTP requests are interpreted by one or more entities in the data flow between the user and the web server, such as a proxy or firewall, they can be interpreted inconsistently, allowing the attacker to "smuggle" a request to one device without the other device being aware of it.
CVE-2026-40175 has been classified to as a HTTP Request Smuggling vulnerability or weakness.
What is a SSRF Vulnerability?
The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination. By providing URLs to unexpected hosts or ports, attackers can make it appear that the server is sending the request, possibly bypassing access controls such as firewalls that prevent the attackers from accessing the URLs directly. The server can be used as a proxy to conduct port scanning of hosts in internal networks, use other URLs such as that can access documents on the system (using file://), or use other protocols such as gopher:// or tftp://, which may provide greater control over the contents of requests.
CVE-2026-40175 has been classified to as a SSRF vulnerability or weakness.
What is a Mass Assignment Vulnerability?
The software receives input from an upstream component that specifies multiple attributes, properties, or fields that are to be initialized or updated in an object, but it does not properly control which attributes can be modified.
CVE-2026-40175 has been classified to as a Mass Assignment vulnerability or weakness.
Products Associated with CVE-2026-40175
You can be notified by email with stack.watch whenever vulnerabilities like CVE-2026-40175 are published in these products:
Affected Versions
axios:- Version >= 1.0.0, < 1.15.0 is affected.
- Version < 0.31.0 is affected.
- Before V3.1.1 is affected.
- Version 0:2.6.9-1.el9ap and below * is unaffected.
- Version 1777128790 and below * is unaffected.
- Version 1778511348 and below * is unaffected.
- Version 1778383863 and below * is unaffected.
- Version 1777301444 and below * is unaffected.
- Version 1778508956 and below * is unaffected.
- Version 1778510461 and below * is unaffected.
- Version 1783451729 and below * is unaffected.
- Version 1776927126 and below * is unaffected.
- Version 1779371594 and below * is unaffected.
- Version 1776784286 and below * is unaffected.
- Version 1777903262 and below * is unaffected.
- Version 1778156756 and below * is unaffected.
- Version 1780590717 and below * is unaffected.
- Version 1779189627 and below * is unaffected.
- Version 1778473763 and below * is unaffected.
- Version 1779189704 and below * is unaffected.
- Version 1778666987 and below * is unaffected.
- Version 1777997704 and below * is unaffected.
- Version 1777994748 and below * is unaffected.
- Version 1776827996 and below * is unaffected.
- Version 1779249923 and below * is unaffected.
- Version 1778645099 and below * is unaffected.
- Version 1778638503 and below * is unaffected.
- Version 1778539338 and below * is unaffected.
- Version 1778539219 and below * is unaffected.
- Version 1776744110 and below * is unaffected.
- Version 1776795511 and below * is unaffected.
- Version 1776202125 and below * is unaffected.
- Version 1776191302 and below * is unaffected.
- Version 1776151124 and below * is unaffected.
- Version 1776151272 and below * is unaffected.
- Version 1776151106 and below * is unaffected.
- Version 1776151270 and below * is unaffected.
- Version 1776155669 and below * is unaffected.
- Version 1776149682 and below * is unaffected.
- Version 1776151134 and below * is unaffected.
- Version 1776151277 and below * is unaffected.
- Version 1776250950 and below * is unaffected.
- Version 1776216284 and below * is unaffected.
- Version 1776269713 and below * is unaffected.
- Version 1776672801 and below * is unaffected.
- Version 1776778645 and below * is unaffected.
Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.