CVE-2026-21697HIGH 8.1EPSS p28.0%

CVE-2026-21697CVE-2026-21697

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.

Scoring

CVSS 3.18.1 (HIGH)
VectorCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS0.36% probability of exploitation · percentile 28.0% · 2026-06-19T12:03:05Z
Published2026-01-07
Last modified2026-03-09

Underlying weaknesses· 1

CWE-362

References

  1. https://github.com/rezmoss/axios4go/commit/b651604c64e66a115ab90cdab358b0181d74a842
  2. https://github.com/rezmoss/axios4go/releases/tag/v0.6.4
  3. https://github.com/rezmoss/axios4go/security/advisories/GHSA-cmj9-27wj-7x47

1

TypeTargetConfidenceTier
WeaknessConcurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')cwe-3620%live

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Sourced from NVD + FIRST.org EPSS. Curated for EU compliance use cases by Adam Lundqvist, Founder at SQUR.