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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 Reserved 2026-01-02 | Published 2026-01-07 | Updated 2026-01-08 | Assigner GitHub_M




HIGH: 8.2CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N

Problem types

CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

Product status

< 0.6.4
affected

References

github.com/...ios4go/security/advisories/GHSA-cmj9-27wj-7x47

github.com/...ommit/b651604c64e66a115ab90cdab358b0181d74a842

github.com/rezmoss/axios4go/releases/tag/v0.6.4

cve.org (CVE-2026-21697)

nvd.nist.gov (CVE-2026-21697)

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