CVE-2026-107396: Indico cross-site scripting in link fields

CVE-2026-107396 · Severity: medium · CVSS 5.4 · Published 2026-10-08

Indico is a web-based event management and conference organization platform. An incomplete content filter in URL input fields allows authenticated users to inject malicious scripts that execute in the browsers of other users viewing the content, potentially stealing session data or performing unauthorized actions on their behalf.

Technologies: Indico, indico (PyPI). Vendors: Indico, PyPI.

Quick answers

Is CVE-2026-107396 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-107396 being exploited in the wild.
How severe is CVE-2026-107396?
Medium severity, with a CVSS score of 5.4, published 8 October 2026.
Which products and versions are affected?
Indico < 3.3.13; indico (PyPI) < 3.3.13, ECOSYSTEM:introduced=0,fixed=3.3.13.
Is there a fix for CVE-2026-107396?
Yes. indico (PyPI): upgrade to 3.3.13 or later. Until then: Set CSP_ENABLED = True in indico.conf to enable Content Security Policy, which reduces XSS impact. Restrict event management and content creation permissions to trustworthy users only, including speaker material upload capabilities. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-107396 attacked?
It is attacked over the network.
Am I affected by CVE-2026-107396?
Check whether you run Indico or 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 3.3.13 or later
    pip install "indico>=3.3.13"

Set CSP_ENABLED = True in indico.conf to enable Content Security Policy, which reduces XSS impact. Restrict event management and content creation permissions to trustworthy users only, including speaker material upload capabilities.

Technical details

An incomplete denylist-based XSS protection in Indico's URL input fields (CWE-692) permits XSS payload variants to bypass filtering. Exploitation requires network access and valid user credentials with low privilege (event management or content creation permissions), plus user interaction (victim viewing the injected link). Successful exploitation can lead to session hijacking, credential theft, or malware delivery with scope change to other users.

Affected products

  • Indico Indico < 3.3.13

Identifiers

  • CVE-2026-107396
  • GHSA-c4wc-ggrj-jg9v
  • PYSEC-2026-4227

Timeline

  • 2026-08-25: disclosed
  • 2026-10-08: advisory

References

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