What is CVE-2026-107397?

CVE-2026-107397 is a medium-severity vulnerability in Indico, classified under Cross-site Scripting. CVSS score: 4.4/10. Published 2026-10-08.

How severe is CVE-2026-107397?

Medium severity. CVSS v3 base score is 4.4 out of 10.

XSS in Indico

CVE-2026-107397

Indico is an event management system that uses Flask-Multipass, a multi-backend authentication system for Flask. Prior to 3.3.13, users who can create content, including speakers who can create minutes, can store crafted HTML in event minutes. When concurrent edits are made to the same minutes, the minute editor conflict UI can execute attacker-controlled script in the viewer's browser in the Indico origin. This issue is fixed in version 3.3.13.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2026-10-08 · last modified 2026-10-08.

CVSS v3 metric

CVSS v3 base score 4.4 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Indico — versions < 3.3.13

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

Frequently asked questions

What is CVE-2026-107397?: CVE-2026-107397 is a medium-severity vulnerability in Indico, classified under Cross-site Scripting. CVSS score: 4.4/10. Published 2026-10-08.
How severe is CVE-2026-107397?: Medium severity. CVSS v3 base score is 4.4 out of 10.