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CVE-2026-8890

HIGH · CVSS 8.2 EPSS 0.49% Public Exploit

Source: NVD + CISA KEV + EPSS · Published: 2026-05-26 · Last synced: 2026-06-25

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Public Exploit Signal

A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.

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CVE
CVE-2026-8890
Severity
HIGH
CVSS
8.2
EPSS
0.49%

Original NVD Description

code100x contains an authentication bypass vulnerability in the Mobile API that allows unauthenticated attackers to impersonate arbitrary users by supplying a crafted JSON payload in the 'g' HTTP header. The middleware in middleware.ts skips identity header generation when an Auth-Key header is present without validating its value, allowing attackers to inject a spoofed user identity header that the downstream route handler in the mobile courses endpoint accepts as trusted, granting unauthorized access to course data belonging to any enrolled user or administrator.