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TI-2026-22632 Aliases CVE-2026-28352GHSA-rfpp-2hgm-gp5v

Indico missing access check in event series management API

Priority LOW 35CWE-306Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Security bypass
Confidentiality · integrity · availability
Low · Low · None
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-306.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00299 22nd percentileScored 2026-11-07
Fix Fixed indico (indico): 3.3.11indico (PyPI): 3.3.11

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
indicoindicobefore 3.3.113.3.11Patch availableCNA
—indico (PyPI)before 3.3.113.3.11Patch availableGHSA-rfpp-2hgm-gp5v
  • indico Vendorindico Affected before 3.3.11 Fixed in 3.3.11 Patch available CNA
  • indico (PyPI) Vendor— Affected before 3.3.11 Fixed in 3.3.11 Patch available GHSA-rfpp-2hgm-gp5v

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:cern:indico:*:*:*:*:*:*:*:*before 3.3.11Vulnerableindico
  • cpe:2.3:a:cern:indico:*:*:*:*:*:*:*:* Versions before 3.3.11 Vulnerable ·indico

Remediation

  • Fix · CNA indico (indico) Fixed in 3.3.11
  • Fix · GHSA-rfpp-2hgm-gp5v indico (PyPI) Fixed in 3.3.11 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-28352
  2. 2026-10-03 Alias added: GHSA-rfpp-2hgm-gp5v

References

Patch 1

Advisory 1

Other 2

  • TI-2024-34052 Authorization bypass in Indico CVSS 3.1HIGH 7.5
  • TI-2026-25492 Indico discloses local files resulting in Remote Code Execution through LaTeX injection CVSS 4.0HIGH 7.7
  • TI-2026-20806 Indico has Server-Side Request Forgery (SSRF) in multiple places CVSS 4.0MEDIUM 6.9
  • TI-2021-10724 CERN Indico before 2.3.4 can use an attacker-supplied Host header in a password reset link. CVSS 3.1HIGH 7.5
  • TI-2024-30448 Indico has a Cross-Site-Scripting during account creation CVSS 3.1MEDIUM 6.1
  • TI-2025-33566 Indico vulnerable to user enumeration via API endpoint CVSS 4.0MEDIUM 5.3
See all 10 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences