Bug 2542571 (CVE-2026-101898)

Summary: CVE-2026-101898 axios: axios: Security control bypass via unapplied HTTP/2 proxy and DNS settings
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security <prodsec-ir-bot>
Status: NEW --- QA Contact:
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Priority: medium    
Version: unspecifiedKeywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in axios. When processing HTTP/2 requests, the client fails to enforce configured proxy settings and custom Domain Name System (DNS) resolution policies. A remote attacker who can influence destination URLs could exploit this vulnerability to bypass outbound network restrictions, potentially leading to Server-Side Request Forgery (SSRF). This may allow unauthorized communication with internal network services or cloud metadata endpoints that should otherwise be blocked.
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Description OSIDB Bzimport 2026-09-28 17:33:11 UTC 
Axios is a promise-based HTTP client for the browser and Node.js. From 1.13.0 until 1.20.0, Axios HTTP/2 request setup does not consistently apply proxy settings and caller-supplied DNS lookup policy. An HTTPS request uses httpVersion: 2 with explicit config.proxy or environment-derived proxy settings, or relies on caller-supplied config.lookup DNS policy. The HTTP/2 path can connect without the configured proxy behavior or without applying the caller-supplied config.lookup policy before http2.connect(). Requests can bypass the intended proxy route or the caller-supplied DNS resolution policy. This issue is fixed in version 1.20.0.