Junglewise Threat Intelligence

CVE-2026-27645: PYSEC-2026-2125 - changedetection.io is a free open source web page change detection tool. In versions prior to 0.54.1, the RSS single-watch endpoint reflects

CVE-2026-27645 · Severity: low · CVSS 3.1 · Published 2026-02-25

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

Executive brief

changedetection.io is a free open source web page change detection tool. In versions prior to 0.54.1, the RSS single-watch endpoint reflects the UUID path parameter 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. Version 0.54.1 contains a fix for the issue.

Affected products

  • PyPI changedetection.io

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