CVE-2026-29038: changedetection.io has Reflected XSS in its RSS Tag Error Response

CVE-2026-29038 · Severity: low · CVSS 3.1 · Published 2026-03-06

changedetection.io is a free open source web page change detection tool. Prior to version 0.54.4, there is a reflected cross-site scripting (XSS) vulnerability identified in the /rss/tag/ endpoint of changedetection.io. The tag_uuid path parameter is reflected directly in the HTTP response body without HTML escaping. Since Flask returns text/html by default for plain string responses, the browser parses and executes injected JavaScript. This issue has been patched in version 0.54.4.

Technologies: changedetection.io (PyPI). Vendors: PyPI.

Quick answers

Is CVE-2026-29038 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-29038 being exploited in the wild.
How severe is CVE-2026-29038?
Low severity, with a CVSS score of 3.1, published 6 March 2026.
Which products and versions are affected?
changedetection.io (PyPI) ECOSYSTEM:introduced=0,fixed=0.54.4.
Is there a fix for CVE-2026-29038?
Yes. changedetection.io (PyPI): upgrade to 0.54.4 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
Am I affected by CVE-2026-29038?
Check whether you run changedetection.io (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

  • changedetection.io (PyPI): upgrade to 0.54.4 or later
    pip install "changedetection.io>=0.54.4"

Affected products

  • changedetection.io (PyPI) ECOSYSTEM:introduced=0,fixed=0.54.4

Identifiers

  • CVE-2026-29038
  • GHSA-8whx-v8qq-pq64
  • PYSEC-2026-2127

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