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

CVE-2026-28352 → View on GitHub ↗ View on CVE.org ↗ View on NVD ↗

Description

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.

Workarounds

  • Developers can configure their webserver to restrict access to the series management API endpoint

For more information

If there are any questions or comments about this advisory:

Basic information

Type
reviewed
Severity
medium
Advisory on GitHub
Open advisory ↗
Repository advisory
Open repository advisory ↗
Source code
Browse source ↗
Published (advisory)
2026-03-01 01:24:27 UTC
Updated
2026-03-01 01:24:28 UTC
GitHub reviewed
2026-03-01 01:24:27 UTC
NVD published
2026-02-27 21:16:19 UTC

EPSS Score

Score Percentile
0.03% 7.07%

CVSS Scores

Base score Version Severity Vector
6.5 3.1 —
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:L)
Some sensitive info could get out, but not a total data dump.
Integrity (I:L)
Attackers could change some data, but it’s limited—not everything goes.
Availability (A:N)
Service keeps running; no real outage angle.

Identifiers

Type Value
GHSA GHSA-rfpp-2hgm-gp5v ↗
CVE CVE-2026-28352 ↗

CWEs

CWE id Name
CWE-306 Missing Authentication for Critical Function

Affected packages (1)

Vulnerable version ranges and first patched releases as published by GitHub.

Ecosystem Package Vulnerable range First patched Vulnerable functions
pip indico < 3.3.11 3.3.11 —

References

cvelogic Threat Intelligence