p PatchFirst

CVE-2026-27696

CVE-2026-27696 · changedetection.io Vulnerable to Server-Side Request Forgery (SSRF) via Watch URLs

This page contains facts from public vulnerability sources. Check the original advisory before updating.

changedetection.io is a free open source web page change detection tool. In versions prior to 0.54.1, changedetection.io is vulnerable to Server-Side Request Forgery (SSRF) because the URL validation function `is_safe_valid_url()` does not validate the resolved IP address of watch URLs against private, loopback, or link-local address ranges. An authenticated user (or any user when no password is configured, which is the default) can add a watch for internal network URLs. The application fetches these URLs server-side, stores the response content, and makes it viewable through the web UI — enabling full data exfiltration from internal services. Version 0.54.1 contains a fix for the issue.

CVSS 8.6 · High · EPSS 0.5% · Fix available

Published
Updated

Stack: python

Affected products and versions

  • changedetection.io

    Versions
    • < 0.54.1: Affected

    No fix published

  • changedetection-io PyPI

    Versions
    • 0.38.2
    • 0.39
    • 0.39.1
    • 0.39.10
    • 0.39.10.post1
    • 0.39.10.post2
    • 0.39.11
    • 0.39.12
    • 0.39.13
    • 0.39.13.1
    • 0.39.14
    • 0.39.14.1
    • 0.39.15
    • 0.39.16
    • 0.39.17
    • 0.39.17.1
    • 0.39.17.2
    • 0.39.18
    • 0.39.19
    • 0.39.19.1
    • 0.39.2
    • 0.39.20
    • 0.39.20.1
    • 0.39.20.2
    • 0.39.20.3
    • 0.39.20.4
    • 0.39.21
    • 0.39.21.1
    • 0.39.22
    • 0.39.22.1
    • 0.39.3
    • 0.39.4
    • 0.39.5
    • 0.39.6
    • 0.39.7
    • 0.39.8
    • 0.39.9
    • 0.40.0
    • 0.40.0.1
    • 0.40.0.2
    • 0.40.0.3
    • 0.40.0.4
    • 0.40.1.0
    • 0.40.1.1
    • 0.40.2
    • 0.40.3
    • 0.41
    • 0.41.1
    • 0.42
    • 0.42.1
    • 0.42.2
    • 0.42.3
    • 0.43.1
    • 0.43.2
    • 0.44
    • 0.44.1
    • 0.45
    • 0.45.1
    • 0.45.11
    • 0.45.12
    • 0.45.13
    • 0.45.14
    • 0.45.15
    • 0.45.16
    • 0.45.17
    • 0.45.18
    • 0.45.19
    • 0.45.2
    • 0.45.20
    • 0.45.21
    • 0.45.22
    • 0.45.23
    • 0.45.24
    • 0.45.25
    • 0.45.26
    • 0.45.3
    • 0.45.4
    • 0.45.5
    • 0.45.6
    • 0.45.7
    • 0.45.7.1
    • 0.45.7.2
    • 0.45.7.3
    • 0.45.8
    • 0.45.8.1
    • 0.45.9
    • 0.46.0
    • 0.46.1
    • 0.46.2
    • 0.46.3
    • 0.46.4
    • 0.47.0
    • 0.47.1
    • 0.47.2
    • 0.47.3
    • 0.47.4
    • 0.47.5
    • 0.47.6
    • 0.48.0
    • 0.48.1
    • 0.48.2
    • 0.48.3
    • 0.48.4
    • 0.48.5
    • 0.48.6
    • 0.49.0
    • 0.49.1
    • 0.49.10
    • 0.49.12
    • 0.49.13
    • 0.49.14
    • 0.49.15
    • 0.49.16
    • 0.49.17
    • 0.49.18
    • 0.49.2
    • 0.49.3
    • 0.49.4
    • 0.49.5
    • 0.49.6
    • 0.49.7
    • 0.49.8
    • 0.49.9
    • 0.50.1
    • 0.50.10
    • 0.50.11
    • 0.50.12
    • 0.50.13
    • 0.50.14
    • 0.50.15
    • 0.50.16
    • 0.50.17
    • 0.50.18
    • 0.50.19
    • 0.50.2
    • 0.50.20
    • 0.50.21
    • 0.50.22
    • 0.50.23
    • 0.50.24
    • 0.50.25
    • 0.50.26
    • 0.50.27
    • 0.50.28
    • 0.50.29
    • 0.50.3
    • 0.50.30
    • 0.50.31
    • 0.50.32
    • 0.50.33
    • 0.50.34
    • 0.50.35
    • 0.50.37
    • 0.50.38
    • 0.50.39
    • 0.50.4
    • 0.50.40
    • 0.50.41
    • 0.50.42
    • 0.50.43
    • 0.50.5
    • 0.50.6
    • 0.50.7
    • 0.50.8
    • 0.50.9
    • 0.51.0
    • 0.51.1
    • 0.51.2
    • 0.51.3
    • 0.51.4
    • 0.52.1
    • 0.52.2
    • 0.52.3
    • 0.52.4
    • 0.52.5
    • 0.52.6
    • 0.52.7
    • 0.52.8
    • 0.52.9
    • 0.53.1
    • 0.53.2
    • 0.53.3
    • 0.53.4
    • 0.53.5
    • 0.53.6
    • 0.53.7
    Affected ranges
    • ECOSYSTEM: < 0.54.1

    Update to 0.54.1

Original sources

Check your server →