axios4go’s Race Condition in Shared HTTP Client Allows Proxy Configuration Leak_CVE-2026-21697

{
    "lastseen": "",
    "description": "axios4go is a Go HTTP client library. Prior to version 0.6.4, a race condition vulnerability exists in the shared HTTP client configuration. The global `defaultClient` is mutated during request execution without synchronization, directly modifying the shared `http.Client`'s `Transport`, `Timeout`, and `CheckRedirect` properties. Impacted applications include that that use axios4go with concurrent requests (multiple goroutines, `GetAsync`, `PostAsync`, etc.), those where different requests use different proxy configurations, and those that handle sensitive data (authentication credentials, tokens, API keys). Version 0.6.4 fixes this issue.",
    "published": "2026-01-07T22:29:57.393Z",
    "modified": "2026-01-07T22:29:57.393Z",
    "type": "cve",
    "title": "axios4go's Race Condition in Shared HTTP Client Allows Proxy Configuration Leak",
    "source": "GitHub_M",
    "references": "https://github.com/rezmoss/axios4go/security/advisories/GHSA-cmj9-27wj-7x47\nhttps://github.com/rezmoss/axios4go/commit/b651604c64e66a115ab90cdab358b0181d74a842\nhttps://github.com/rezmoss/axios4go/releases/tag/v0.6.4",
    "id": "CVE-2026-21697",
    "bulletinFamily": "",
    "cwe": [
        "CWE-362"
    ],
    "cvelist": null,
    "sourceData": "rezmoss axios4go < 0.6.4",
    "sourceHref": "",
    "cvss": {
        "score": 8.2,
        "severity": "HIGH",
        "vector": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N",
        "version": "4.0"
    },
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        "cvssV3": {
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    "href": "",
    "category_name": "CVE",
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    "product": "axios4go",
    "version": "< 0.6.4",
    "vendor": "rezmoss",
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}