CVE-2026-27645
Medium · 6.1CVSS
6.1
EPSS
0.5%
Published
Feb 25, 2026
CISA due date
—
The record
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 packages
| Ecosystem | Package | Introduced | Fixed |
|---|---|---|---|
| PyPI | changedetection-io | 0 | 0.53.7 |
Related vulnerabilities
- GHSA-mw8m-398g-h89w changedetection.io Vulnerable to Reflected XSS in RSS Single Watch Error Response Same vulnerability
- CVE-2026-29065 changedetection.io is a free open source web page change detection tool. Also affects changedetection-io
- CVE-2026-29039 changedetection.io is a free open source web page change detection tool. Also affects changedetection-io
- CVE-2026-29038 changedetection.io is a free open source web page change detection tool. Also affects changedetection-io
- GHSA-25g8-2mcf-fcx9 changedetection.io has Zip Slip vulnerability in the backup restore functionality Also affects changedetection-io
- GHSA-6fmw-82m7-jq6p changedetection.io vulnerable to XPath - Arbitrary File Read via unparsed-text() Also affects changedetection-io
- GHSA-8whx-v8qq-pq64 changedetection.io has Reflected XSS in its RSS Tag Error Response Also affects changedetection-io
- GHSA-3c45-4pj5-ch7m changedetection.io is Vulnerable to SSRF via Watch URLs Also affects changedetection-io