CVE-2026-107395: Indico: Missing access check in legacy session export API

Severity: medium (CVSS 4.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-10-08 · updated 2026-10-09
Weakness: CWE-862

Description

Indico is an event management system that uses Flask-Multipass, a multi-backend authentication system for Flask. Prior to 3.3.13, an authenticated user can misuse the legacy session export API to retrieve details for a restricted session without access to that session, as long as the containing event is accessible. The missing access check can disclose session metadata such as the title, description, and conveners. This issue is fixed in version 3.3.13.

Affected products

indico: before 3.3.13

References

https://github.com/indico/indico/commit/524e8e93eadcd8484905b1147020a35f5dce6038
https://github.com/indico/indico/releases/tag/v3.3.13
https://github.com/indico/indico/security/advisories/GHSA-6p4f-j8j6-463q

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