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TI-2026-07812 Aliases CVE-2026-8890GHSA-qggg-4j5m-mx55

code100x Mobile API Authentication Bypass via Header Spoofing

Priority HIGH 77CWE-639Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Security bypass
Confidentiality · integrity · availability
High · Low · None
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-639.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.0049 42nd percentileScored 2026-11-07
Fix Fixed code100x (code100x): 90b489ee7c63c301107d6374d4b3f2b8e4060fe5, 88c6c5e94e23da101235c4c7e9c7591ac1016549

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
code100xcode100xbefore 90b489ee7c63c301107d6374d4b3f2b8e4060fe5; before 88c6c5e94e23da101235c4c7e9c7591ac101654990b489ee7c63c301107d6374d4b3f2b8e4060fe5, 88c6c5e94e23da101235c4c7e9c7591ac1016549Patch availableCNA
  • code100x Vendorcode100x Affected before 90b489ee7c63c301107d6374d4b3f2b8e4060fe5; before 88c6c5e94e23da101235c4c7e9c7591ac1016549 Fixed in 90b489ee7c63c301107d6374d4b3f2b8e4060fe5, 88c6c5e94e23da101235c4c7e9c7591ac1016549 Patch available CNA

Remediation

  • Fix · CNA code100x (code100x) Fixed in 90b489ee7c63c301107d6374d4b3f2b8e4060fe5, 88c6c5e94e23da101235c4c7e9c7591ac1016549

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-8890
  2. 2026-10-03 Alias added: GHSA-qggg-4j5m-mx55

References

Patch 3

Other 1

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences