Indico has a missing access check in the event series management API

Exploitation

No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.

CVSS

6.5 · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

EPSS

• CVE-2026-28352: 0.30% estimated exploitation activity in the next 30 days; percentile 22.70 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.

As published by the source; long descriptions are shortened.

Impact 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: This just removes the series metadata, ie (if enabled) the links between events in the same series and the lecture series number in the event title - Modifying an existing event series: Just like for deleting, it would only allow to toggle the metadata display. It could also be used to set an event title pattern for the series, but this is only used when cloning an event from that series. That 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. Patches Developers should to update to Indico 3.3.11 as soon as possible. See the docs for instructions on how to update.…

Published by the source

1 Mar 2026, 01:24 UTC

Last modified by the source

13 Jul 2026, 07:26 UTC

Source last checked

26 Oct 2026, 13:36 UTC

1. Revision 2 · amended · 26 Oct 2026

   Amended from ghsa record GHSA-rfpp-2hgm-gp5v

2. Revision 1 · created · 24 Oct 2026

   Published from osv record GHSA-rfpp-2hgm-gp5v

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# Patch Next advisory brief: CVE-2026-28352

Advisory: Indico has a missing access check in the event series management API
IDs: CVE-2026-28352, GHSA-rfpp-2hgm-gp5v
Record: https://patchnext.com/advisories/cve-2026-28352 (revision 2, source checked 26 Oct 2026, 13:36 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: Medium (CVSS 6.5)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: indico 3.3.11. A vendor fix does not mean a deployment is fixed.

## Affected components
- PyPI indico: affected < 3.3.11; fixed in 3.3.11

## Suggested inspection (read-only)
- `python -m pip show indico`: prints the installed version. Run with the environment that serves production active.

## Supported action
Upgrade each affected component to a fixed version on its release line. For a transitive dependency, upgrade the parent package or add an override or constraint, then regenerate the lockfile. Redeploy every environment that ran an affected version.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on indico.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://osv.dev/vulnerability/GHSA-rfpp-2hgm-gp5v (OSV record GHSA-rfpp-2hgm-gp5v lists affected ranges: PyPI indico >=0 <3.3.11 (fixed))
- Verified: https://github.com/advisories/GHSA-rfpp-2hgm-gp5v (GitHub-reviewed advisory GHSA-rfpp-2hgm-gp5v lists affected ranges: PyPI indico >=0 <3.3.11)

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