CVE-2026-29039: changedetection.io vulnerable to XPath - Arbitrary File Read via unparsed-text()

CVE-2026-29039 · Severity: medium · CVSS 4 · Published 2026-03-06

changedetection.io is a free open source web page change detection tool. Prior to version 0.54.4, the changedetection.io application allows users to specify XPath expressions as content filters via the include_filters field. These XPath expressions are processed using the elementpath library which implements XPath 3.0/3.1 specification. XPath 3.0 includes the unparsed-text() function which can read arbitrary files from the filesystem. The application does not validate or sanitize XPath expressions to block dangerous functions, allowing an attacker to read any file accessible to the application process. This issue has been patched in version 0.54.4.

Technologies: changedetection.io (PyPI). Vendors: PyPI.

Quick answers

Is CVE-2026-29039 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-29039 being exploited in the wild.
How severe is CVE-2026-29039?
Medium severity, with a CVSS score of 4, published 6 March 2026.
Which products and versions are affected?
changedetection.io (PyPI) ECOSYSTEM:introduced=0,fixed=0.54.4.
Is there a fix for CVE-2026-29039?
Yes. changedetection.io (PyPI): upgrade to 0.54.4 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
Am I affected by CVE-2026-29039?
Check whether you run changedetection.io (PyPI) 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 0.54.4 or later
    pip install "changedetection.io>=0.54.4"

Affected products

  • changedetection.io (PyPI) ECOSYSTEM:introduced=0,fixed=0.54.4

Identifiers

  • CVE-2026-29039
  • GHSA-6fmw-82m7-jq6p
  • PYSEC-2026-2128

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