Dashboard / CVE-2026-8890

CVE-2026-8890

HIGH
MEDIUM Priority: 0.04 BB Relevance: 76/100
Published: 2026-05-26 Modified: 2026-11-08 First seen: 2026-11-08 Status: active

Attack Surface

Network Low Complexity No Auth No Interaction Conf. Impact

CVSS Vector Breakdown

AV: Network
AC: Low
PR: None
UI: None
S: Unchanged
C: High
I: Low
A: None

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.

Weakness Classification (1)

Affected Software (2)

VendorProductVersion
code100x code100x 0 < 90b489ee7c63c301107d6374d4b3f2b8e4060fe5
code100x code100x 0 < 88c6c5e94e23da101235c4c7e9c7591ac1016549

References & Advisories (5)

Bug Bounty Relevance

76 / 100
✓ Network accessible
✓ No authentication
✓ Low complexity
✓ No user interaction

CVSS Score

8.2 / 10.0 v3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N

EPSS — Exploitation Probability

0.49%
Raw Score 0.004900
Percentile 42.7%
Date 2026-11-13

EPSS Trend

2026-11-13
0.00490
2026-11-12
0.00490
2026-11-10
0.00490
2026-11-09
0.00490
2026-11-08
0.00490

Intelligence Sources

mitre ref →

External Links