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    CVE-2026-27645

    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.

    Published:Feb 25, 2026
    Last Modified:Apr 17, 2026
    EPS:Feb 25, 2026
    EPSS Score:0.008
    CVSS Score:6.1

    Affected Products

    Vendor
    Dgtlmoon
    Product
    Changedetection.io
    Vendor
    Webtechnologies
    Product
    Changedetection

    Exploits

    https://github.com/dgtlmoon/changedetection.io/security/advisories/GHSA-mw8m-398g-h89whttps://github.com/dgtlmoon/changedetection.io/security/advisories/GHSA-mw8m-398g-h89w

    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 …
    CVE-2026-71204 (CVSS 6.2) — changedetection.io's /settings save handler builds an update dict from form.data['application'] and blind-merg…
    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