changedetection.io Vulnerable to Server-Side Request Forgery (SSRF) via Watch URLs
Description
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.
AI Insight
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Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
changedetection.ioPyPI | < 0.54.1 | 0.54.1 |
Affected products
2- Range: < 0.54.1
Patches
Vulnerability mechanics
References
4- github.com/advisories/GHSA-3c45-4pj5-ch7mghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2026-27696ghsaADVISORY
- github.com/dgtlmoon/changedetection.io/commit/fe7aa38c651d73fe5f41ce09855fa8f97193747bghsax_refsource_MISCWEB
- github.com/dgtlmoon/changedetection.io/security/advisories/GHSA-3c45-4pj5-ch7mghsax_refsource_CONFIRMWEB
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