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CVE-2026-21697

8.1 · HIGH

axios4go is a Go HTTP client library.

Published Jan 7, 2026CWE-362EPSS 0.41%

Overview

CVE-2026-21697 is a high-severity vulnerability. It was published on January 7, 2026 and has a CVSS 3.1 base score of 8.1 (HIGH).

This vulnerability has a CVSS 3.1 base score of 8.1, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical 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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgithub.com/rezmoss/axios4go/commit/b651604c64e66a115ab90cdab358b0181d74a842GitHubgithub.com/rezmoss/axios4go/releases/tag/v0.6.4GitHubgithub.com/rezmoss/axios4go/security/advisories/GHSA-cmj9-27wj-7x47

How CyberStrike helps

Frequently asked questions

What is CVE-2026-21697?

CVE-2026-21697 is a high-severity vulnerability. It was published on January 7, 2026 and has a CVSS 3.1 base score of 8.1 (HIGH).

How severe is CVE-2026-21697?

This vulnerability has a CVSS 3.1 base score of 8.1, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2026-21697?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-21697?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-21697 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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