What is CVE-2026-28352?

CVE-2026-28352 is a medium-severity vulnerability in Cern Indico, classified under Missing Authentication for Critical Function. CVSS score: 6.5/10. Published 2026-02-27.

How severe is CVE-2026-28352?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Auth bypass in Cern Indico

CVE-2026-28352

Indico is an event management system that uses Flask-Multipass, a multi-backend authentication system for Flask. In versions prior to 3.3.11, the API endpoint used to manage event series is missing an access check, allowing unauthenticated…

Vulnerability class: Broken Authentication

EPSS: 0.003 (17.7th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N.

Affected products

Cern Indico
Indico — versions < 3.3.11

Weakness classification (CWE)

CWE-306 — Missing Authentication for Critical Function

References

security-advisories@github.com (x_refsource_CONFIRM, Patch, Mitigation, Vendor Advisory)
security-advisories@github.com (Product, x_refsource_MISC, Release Notes)

Frequently asked questions

What is CVE-2026-28352?: CVE-2026-28352 is a medium-severity vulnerability in Cern Indico, classified under Missing Authentication for Critical Function. CVSS score: 6.5/10. Published 2026-02-27.
How severe is CVE-2026-28352?: Medium severity. CVSS v3 base score is 6.5 out of 10.