MEDIUM6.1

PYSEC-2026-2125

Quick fix

PYSEC-2026-2125 — changedetection-io: upgrade to the fixed version with the command below.

pip install --upgrade 'changedetection-io>=0.54.1'

Details

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.

Are you affected?

Enter the version of the package you're using.

Affected packages

PyPI/changedetection-io

Introduced in: 0Fixed in: 0.54.1

Fixpip install --upgrade 'changedetection-io>=0.54.1'

References

https://github.com/dgtlmoon/changedetection.io/commit/a385c89abf44b52fcfa20c7c6a6dd3047c4c1eb5[FIX]
https://github.com/dgtlmoon/changedetection.io/security/advisories/GHSA-mw8m-398g-h89w[EVIDENCE]