dgtlmoon changedetection.io up to 0.54.9 xpath_filter xml external entity reference

Summaryinfo

A vulnerability, which was classified as problematic, was found in dgtlmoon changedetection.io up to 0.54.9. This affects the function xpath_filter. The manipulation results in xml external entity reference. This vulnerability was named CVE-2026-41895. The attack may be performed from remote. There is no available exploit.

Detailsinfo

A vulnerability, which was classified as problematic, was found in dgtlmoon changedetection.io up to 0.54.9. Affected is the function xpath_filter. The manipulation with an unknown input leads to a xml external entity reference vulnerability. CWE is classifying the issue as CWE-611. The product processes an XML document that can contain XML entities with URIs that resolve to documents outside of the intended sphere of control, causing the product to embed incorrect documents into its output. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

changedetection.io is a free open source web page change detection tool. In 0.54.9 and earlier, xpath_filter() switches to XML mode for XML/RSS content and creates etree.XMLParser(strip_cdata=False) without explicitly disabling external entity resolution, external DTD loading, or network-backed entity lookup. The helper then parses untrusted XML bytes directly with etree.fromstring(...).

The advisory is shared for download at github.com. This vulnerability is traded as CVE-2026-41895 since 04/22/2026. The exploitability is told to be difficult. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. There are known technical details, but no exploit is available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 05/12/2026).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Vendor

• dgtlmoon

Name

• changedetection.io

Version

• 0.54.0
• 0.54.1
• 0.54.2
• 0.54.3
• 0.54.4
• 0.54.5
• 0.54.6
• 0.54.7
• 0.54.8
• 0.54.9

Website

• Product: https://github.com/dgtlmoon/changedetection.io/

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