CVE-2026-41895: dgtlmoon changedetection.io XXE in xpath_filter

CVE-2026-41895 · Severity: high · CVSS 7.5 · Published 2026-05-12

changedetection.io is a tool used to monitor websites for content changes. A security vulnerability exists where the tool incorrectly processes XML data from monitored sites. An attacker who controls a monitored website could use this flaw to read sensitive files from the server running the software, potentially leading to data theft or exposure of system configurations.

Technologies: changedetection.io (PyPI), Webtechnologies Changedetection. Vendors: PyPI, Webtechnologies.

Quick answers

Is CVE-2026-41895 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-41895 being exploited in the wild.
How severe is CVE-2026-41895?
High severity, with a CVSS score of 7.5, published 12 May 2026.
Which products and versions are affected?
changedetection.io (PyPI) <= 0.54.9, ECOSYSTEM:introduced=0,fixed=0.54.10, ECOSYSTEM:introduced=0,last_affected=0.54.9.
Is there a fix for CVE-2026-41895?
Yes. changedetection.io (PyPI): upgrade to 0.54.10 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-41895 attacked?
It is attacked over the network, in a network appliance.
Am I affected by CVE-2026-41895?
Check whether you run changedetection.io (PyPI) or Webtechnologies Changedetection at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

  • changedetection.io (PyPI): upgrade to 0.54.10 or later
    pip install "changedetection.io>=0.54.10"

Technical details

An XML External Entity (XXE) vulnerability exists in the `xpath_filter()` function within `changedetectionio/html_tools.py`. The application uses `lxml.etree.XMLParser` to parse XML/RSS content but fails to explicitly disable external entity resolution (`resolve_entities=False`), DTD loading, or network lookups. An attacker who controls the XML content of a monitored URL can trigger this vulnerability by using an XPath include filter. This allows the attacker to disclose sensitive local files from the host system, which are then included in the watch output, diff history, or notification channels. The vulnerability is present in versions up to and including 0.54.9.

Affected products

  • dgtlmoon changedetection.io <= 0.54.9

Identifiers

  • CVE-2026-41895
  • GHSA-v7cp-2cx9-x793
  • PYSEC-2026-29

Timeline

  • 2026-04-27: disclosed: Initial disclosure to vendor
  • 2026-05-04: advisory: GitHub Advisory published
  • 2026-05-12: other: NVD publication date

References

This page as Markdown. Free to reuse under CC BY 4.0 with a link back.