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.

Attack Vector Network

Attack Complexity Low

Privileges Required None

Attack Requirements None

User Interaction None

Vulnerable System Confidentiality Impact High

Vulnerable System Integrity Impact Low

Vulnerable System Availability Impact None

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact High

Integrity Impact Low

Availability Impact None

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Exploitation poc

Automatable yes

Technical Impact partial

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
code100x code100x unknown
Version Status Constraints
0 affected < 90b489ee7c63c301107d6374d4b3f2b8e4060fe5
0 affected < 88c6c5e94e23da101235c4c7e9c7591ac1016549

No data.

No data.

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No data.

Project Subscriptions

No data.

Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://github.com/code100x/cms/issues/1924 cve-icon cve-icon cve-icon
https://github.com/code100x/cms/pull/1927 cve-icon cve-icon cve-icon
https://github.com/code100x/cms/pull/1927/changes/88c6c5e94e23da101235c4c7e9c7591ac1016549 cve-icon cve-icon
https://github.com/code100x/cms/pull/1927/changes/90b489ee7c63c301107d6374d4b3f2b8e4060fe5 cve-icon cve-icon
https://www.vulncheck.com/advisories/code100x-mobile-api-authentication-bypass-via-header-spoofing cve-icon cve-icon
History

Tue, 26 May 2026 20:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Tue, 26 May 2026 19:00:00 +0000

Type Values Removed Values Added
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.
Title code100x Mobile API Authentication Bypass via Header Spoofing
Weaknesses CWE-639
References
Metrics cvssV3_1

{'score': 8.2, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N'}

cvssV4_0

{'score': 8.8, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-05-26T19:25:54.063Z

Reserved: 2026-05-18T20:47:38.669Z

Link: CVE-2026-8890

cve-icon Vulnrichment

Updated: 2026-05-26T19:24:59.211Z

cve-icon NVD

Status : Deferred

Published: 2026-05-26T19:16:34.007

Modified: 2026-05-26T20:16:21.293

Link: CVE-2026-8890

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-05-26T20:30:15Z

Weaknesses