CVE-2026-29039
HIGH
GHSA-6fmw-82m7-jq6p
CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Lifecycle Timeline
4Description
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.
Analysis
Arbitrary file read in changedetection.io prior to 0.54.4 allows unauthenticated remote attackers to access sensitive files by injecting malicious XPath expressions into content filters, exploiting the unparsed-text() function in the elementpath library. The application fails to validate or sanitize XPath input, enabling attackers to read any file accessible to the application process. …
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Remediation
Within 24 hours: Identify all changedetection.io instances and document versions in use; disable or restrict access to the include_filters feature if immediate patching is not feasible. Within 7 days: Apply vendor patch to upgrade all instances to version 0.54.4 or later; validate deployments post-patch. …
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External POC / Exploit Code
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