Vulnerability · Published Oct 8, 2026 · Assigned by GitHub_M

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

Medium 4.3

In plain English

A medium-severity missing authorization in indico from indico. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 14% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)4.3Medium

Exploit odds (30 days)0.2%top 85.5% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official 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 packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
PyPI	indico	3.3.13	GHSA-6p4f-j8j6-463q
PyPI	indico	3.3.13	PYSEC-2026-4226

Affected products (as reported)

Vendor	Product	Versions
indico	indico	< 3.3.13

Weakness: CWE-862 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

References

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