Axios HTTP Client NO_PROXY Bypass via 127.0.0.0/8 (before 1.15.1/0.31.1)
CVE-2026-42043 Published on April 24, 2026

Axios: Incomplete Fix for CVE-2025-62718 — NO_PROXY Protection Bypassed via RFC 1122 Loopback Subnet (127.0.0.0/8) in Axios 1.15.0
Axios is a promise based HTTP client for the browser and Node.js. Prior to 1.15.1 and 0.31.1, an attacker who can influence the target URL of an Axios request can use any address in the 127.0.0.0/8 range (other than 127.0.0.1) to completely bypass the NO_PROXY protection. This vulnerability is due to an incomplete for CVE-2025-62718, This vulnerability is fixed in 1.15.1 and 0.31.1.

NVD

Vulnerability Analysis

CVE-2026-42043 can be exploited with network access, and does not require authorization privileges or user interaction. This vulnerability is considered to have a low attack complexity. An automatable proof of concept (POC) exploit exists. The potential impact of an exploit of this vulnerability is considered to have a small impact on confidentiality and integrity, and no impact on availability.

Attack Vector:
NETWORK
Attack Complexity:
LOW
Privileges Required:
NONE
User Interaction:
NONE
Scope:
CHANGED
Confidentiality Impact:
LOW
Integrity Impact:
LOW
Availability Impact:
NONE

Weakness Types

What is an Allowlist / Allow List Vulnerability?

The product implements a protection mechanism that relies on a list of inputs (or properties of inputs) that are explicitly allowed by policy because the inputs are assumed to be safe, but the list is too permissive - that is, it allows an input that is unsafe, leading to resultant weaknesses.

CVE-2026-42043 has been classified to as an Allowlist / Allow List vulnerability or weakness.

What is a Confused Deputy Vulnerability?

The product receives a request, message, or directive from an upstream component, but the product does not sufficiently preserve the original source of the request before forwarding the request to an external actor that is outside of the product's control sphere. This causes the product to appear to be the source of the request, leading it to act as a proxy or other intermediary between the upstream component and the external actor.

CVE-2026-42043 has been classified to as a Confused Deputy 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-2026-42043 has been classified to as a SSRF vulnerability or weakness.


Products Associated with CVE-2026-42043

You can be notified by email with stack.watch whenever vulnerabilities like CVE-2026-42043 are published in these products:

Axios
 
Red Hat Apache Camel Hawtio
 
Red Hat Network Observ Optr
 
Red Hat Acm
 
Red Hat Advanced Cluster Security
 
Red Hat Jboss Data Grid
 
Red Hat Rhdh
 
Red Hat Discovery
 
Red Hat Rhmt
 
Red Hat Openshift Ai
 
Red Hat Openshift
 
Red Hat Openshift Devspaces
 
Red Hat Service Mesh
 
Red Hat Quay
 
Red Hat Satellite
 
Red Hat Multicluster Engine
 
Red Hat Openshift Pipelines
 
Red Hat Ansible Automation Platform
 
Red Hat Service Registry
 
Red Hat Apicurio Registry
 
Red Hat Podman Desktop
 
Red Hat Enterprise Linux (RHEL)
 
Red Hat Enterprise Linux Ai
 
Red Hat Ansible Portal
 
Red Hat Cryostat
 
Red Hat Gatekeeper
 
Red Hat Migration Toolkit Applications
 
Red Hat 3scale Amp
 
Red Hat Jboss Fuse
 
Red Hat Hummingbird
 
Red Hat Container Native Virtualization
 
Red Hat Jboss Enterprise Bpms Platform
 
Red Hat Trusted Artifact Signer
 
Red Hat Trusted Profile Analyzer
 
Red Hat Amq Streams
 

Affected Versions

axios: Red Hat HawtIO HawtIO 4.4.0: Red Hat Network Observability (NETOBSERV) 1.11.2: Red Hat Advanced Cluster Management for Kubernetes 2.14: Red Hat Advanced Cluster Management for Kubernetes 2.15: Red Hat Advanced Cluster Management for Kubernetes 2.16: Red Hat Advanced Cluster Security for Kubernetes 4.10: Red Hat Advanced Cluster Security for Kubernetes 4.9: Red Hat Data Grid 8.6.1: Red Hat Developer Hub 1.8: Red Hat Developer Hub 1.9: Red Hat Discovery 2: Red Hat Migration Toolkit 1.8: Red Hat OpenShift AI 2.25: Red Hat OpenShift Container Platform 4.20: Red Hat OpenShift Container Platform 4.21: Red Hat OpenShift Dev Spaces 3.28: Red Hat OpenShift Service Mesh 2.6: Red Hat OpenShift Service Mesh 3.1: Red Hat OpenShift Service Mesh 3.2: Red Hat OpenShift Service Mesh 3.3: Red Hat OpenShift Service Mesh 3: Red Hat Quay 3.10: Red Hat Quay 3.12: Red Hat Quay 3.14: Red Hat Quay 3.15: Red Hat Quay 3.16: Red Hat Quay 3.17: Red Hat Quay 3.9: Red Hat Satellite 6.18: Red Hat multicluster engine for Kubernetes 2.10: Red Hat multicluster engine for Kubernetes 2.11: Red Hat multicluster engine for Kubernetes 2.6: Red Hat multicluster engine for Kubernetes 2.8: Red Hat multicluster engine for Kubernetes 2.9: Red Hat OpenShift Pipelines: Red Hat Ansible Automation Platform 2: Red Hat build of Apicurio Registry 2: Red Hat build of Apicurio Registry 3: Red Hat Build of Podman Desktop - Tech Preview: Red Hat Enterprise Linux 8: Red Hat Enterprise Linux AI (RHEL AI) 3: Red Hat OpenShift AI (RHOAI): Red Hat OpenShift Container Platform 4: Red Hat Self-service automation portal 2: Red Hat Cryostat 4: Red Hat Gatekeeper 3: Red Hat Migration Toolkit for Applications 8: Red Hat OpenShift Service Mesh 3: Red Hat 3scale API Management Platform 2: Red Hat Enterprise Linux 9: Red Hat Fuse 7: Red Hat Hardened Images: Red Hat OpenShift Virtualization 4: Red Hat Process Automation 7: Red Hat Trusted Artifact Signer: Red Hat Trusted Profile Analyzer: Red Hat streams for Apache Kafka 2: Red Hat streams for Apache Kafka 3:

Exploit Probability

EPSS
0.39%
Percentile
31.12%

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.