What is CVE-2026-8890?

CVE-2026-8890 is a high-severity vulnerability in Code100x, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 8.2/10. Published 2026-05-26.

How severe is CVE-2026-8890?

High severity. CVSS v3 base score is 8.2 out of 10.

Auth bypass in Code100x

CVE-2026-8890

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 ski…

Vulnerability class: IDOR (Insecure Direct Object Reference)

EPSS: 0.001 (26.5th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N.

Affected products

Code100x — versions 0

Weakness classification (CWE)

CWE-639 — Authorization Bypass Through User-Controlled Key

References

disclosure@vulncheck.com (technical-description)
disclosure@vulncheck.com
disclosure@vulncheck.com
disclosure@vulncheck.com
disclosure@vulncheck.com (third-party-advisory)

Frequently asked questions

What is CVE-2026-8890?: CVE-2026-8890 is a high-severity vulnerability in Code100x, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 8.2/10. Published 2026-05-26.
How severe is CVE-2026-8890?: High severity. CVSS v3 base score is 8.2 out of 10.