Axios CVE-2026-40175: Critical Vulnerability Misrepresented as Easily Exploitable

Severity: Medium (Score: 42.9)

Sources: Aikido.Dev, Digital.Nhs.Uk, github.com, www.cve.org, Gbhackers

Summary

A critical vulnerability in Axios, tracked as CVE-2026-40175, was reported with a CVSS score of 9.9, suggesting potential for remote code execution (RCE) and cloud infrastructure compromise. However, analysis reveals that exploitation is not feasible in typical production environments due to Node.js's built-in protections against malformed headers. The vulnerability arises from unsafe header values allowed by Axios, but Node.js has blocked the core exploit mechanism for years. The researcher who reported the issue confirmed that real-world applications should not be affected, as the exploit requires non-standard usage of Axios. While the CVE is valid at the library level, the practical risk is significantly lower than initially portrayed. The vulnerability was published on April 10, 2026, and has sparked widespread media attention despite its limited exploitability. Key Points: • CVE-2026-40175 has a CVSS score of 9.9 but is not easily exploitable in practice. • Node.js blocks the core exploit mechanism, making real-world attacks unlikely. • The vulnerability exists at the library level, but typical usage of Axios mitigates risk.

Key Entities

• Remote Code Execution (attack_type)
• Supply Chain Attack (attack_type)
• Zero-day Exploit (attack_type)
• Axios (platform)
• IMDSv1 (platform)
• IMDSv2 (platform)
• CVE-2026-40175 (cve)
• T1041 - Exfiltration Over C2 Channel (mitre_attack)
• Bun (tool)
• Deno (tool)
• Node.js (tool)
• Prototype Pollution (vulnerability)