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    CVE-2026-27696

    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.

    Published:Feb 25, 2026
    Last Modified:Apr 17, 2026
    EPS:Feb 25, 2026
    EPSS Score:0.00021
    CVSS Score:8.6

    Affected Products

    Vendor
    Dgtlmoon
    Product
    Changedetection.io
    Vendor
    Webtechnologies
    Product
    Changedetection

    Exploits

    https://github.com/dgtlmoon/changedetection.io/security/advisories/GHSA-3c45-4pj5-ch7mhttps://github.com/dgtlmoon/changedetection.io/security/advisories/GHSA-3c45-4pj5-ch7m

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-664 Server Side Request Forgery

    Related CVEs

    CVE-2026-71205 (CVSS 6.5) — changedetection.io's /login route checks the submitted password against a single PBKDF2-HMAC-SHA256 hash with …
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    CVE-2026-71203 (CVSS 5.3) — changedetection.io's REST API resources are protected by an @auth.check_token decorator validating the caller'…
    CVE-2026-43891 (CVSS 7.5) — changedetection.io is a free open source web page change detection tool. Prior to 0.55.1, the vulnerability is…
    CVE-2026-41895 (CVSS 8.2) — changedetection.io is a free open source web page change detection tool. In 0.54.9 and earlier, xpath_filter()…
    CVE-2026-35490 (CVSS 9.8) — changedetection.io is a free open source web page change detection tool. Prior to 0.54.8, the @login_optionall…
    CVE-2026-35000 (CVSS 7.1) — ChangeDetection.io versions prior to 0.54.7 contain a protection bypass vulnerability in the SafeXPath3Parser …
    CVE-2026-33981 (CVSS 8.3) — changedetection.io is a free open source web page change detection tool. Prior to 0.54.7, the `jq:` and `jqraw…
    CVE-2026-29065 (CVSS 8.8) — changedetection.io is a free open source web page change detection tool. Prior to version 0.54.4, a Zip Slip v…
    CVE-2026-29039 (CVSS 8.8) — changedetection.io is a free open source web page change detection tool. Prior to version 0.54.4, the changede…

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High