Server-Side Request Forgery in Changedetection.io Affects Internal URLs
CVE-2026-27696

8.6HIGH

Key Information:

Vendor

Dgtlmoon

Status
Changedetection.io
Vendor
CVE Published:
25 February 2026

What is CVE-2026-27696?

Changedetection.io, an open-source web page change detection tool, is susceptible to Server-Side Request Forgery (SSRF) in versions prior to 0.54.1 due to inadequate validation of resolved IP addresses in the URL validation function. This vulnerability allows an authenticated user, or even a user without a password configured, to manipulate the tool to fetch internal network URLs. The application processes these requests server-side and exposes the content through the web interface, potentially leading to significant data exfiltration from internal services. A patch was introduced in version 0.54.1 to rectify this issue.

Affected Version(s)

changedetection.io < 0.54.1

References

https://github.com/dgtlmoon/changedetection.io/security/a...
x_refsource_CONFIRM
https://github.com/dgtlmoon/changedetection.io/commit/fe7...
x_refsource_MISC

CVSS V3.1

Score:
8.6
Severity:
HIGH
Confidentiality:
High
Integrity:
None
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.