# CVE-2026-28352: Indico has a missing access check in the event series management API

Source: https://junglewise.ai/threats/cve-2026-28352-indico-has-a-missing-access-check-in-the-event-series-management  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-02-27  
License: CC BY 4.0 with a link back

CVE-2026-28352 · Severity: low · CVSS 3.1 · Published 2026-02-27

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/unauthorized access to this endpoint. The impact of this is limited to getting the metadata (title, category chain, start/end date) for events in an existing series, deleting an existing event series, and modifying an existing event series. This vulnerability does NOT allow unauthorized access to events (beyond the basic metadata mentioned above), nor any kind of tampering with user-visible data in events. Version 3.3.11 fixes the issue. As a workaround, use the webserver to restrict access to the series management API endpoint.

Technologies: [indico (PyPI)](https://junglewise.ai/threats/technologies/indico). Vendors: [PyPI](https://junglewise.ai/threats/vendors/pypi).

## Quick answers

**Is CVE-2026-28352 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-28352 being exploited in the wild.

**How severe is CVE-2026-28352?** Low severity, with a CVSS score of 3.1, published 27 February 2026.

**Which products and versions are affected?** indico (PyPI) ECOSYSTEM:introduced=0,fixed=3.3.11.

**Is there a fix for CVE-2026-28352?** Yes. indico (PyPI): upgrade to 3.3.11 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**Am I affected by CVE-2026-28352?** Check whether you run indico (PyPI) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- indico (PyPI): upgrade to 3.3.11 or later

  ```sh
  pip install "indico>=3.3.11"
  ```


## Affected products

- indico (PyPI) ECOSYSTEM:introduced=0,fixed=3.3.11

## Identifiers

- CVE-2026-28352
- GHSA-rfpp-2hgm-gp5v
- PYSEC-2026-2183

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