What is CVE-2026-85210?

CVE-2026-85210 is a medium-severity vulnerability, classified under Missing Authorization. CVSS score: 4.3/10. Published 2026-09-03.

How severe is CVE-2026-85210?

Medium severity. CVSS v3 base score is 4.3 out of 10.

CVE-2026-85210

CVE-2026-85210

Oppia's AdminRoleHandler GET endpoint in core/controllers/admin.py is decorated with open_access, allowing any registered user to enumerate privileged accounts and roles. Attackers can query the endpoint with filter_criterion parameters to retrieve usernames holding specific roles, banned flags, and managed topic identifiers without authorization.

Vulnerability class: Broken Access Control

CVSS v3 metric

CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N.

Weakness classification (CWE)

CWE-862 — Missing Authorization

References

disclosure@vulncheck.com
disclosure@vulncheck.com
disclosure@vulncheck.com
disclosure@vulncheck.com

Frequently asked questions

What is CVE-2026-85210?: CVE-2026-85210 is a medium-severity vulnerability, classified under Missing Authorization. CVSS score: 4.3/10. Published 2026-09-03.
How severe is CVE-2026-85210?: Medium severity. CVSS v3 base score is 4.3 out of 10.