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High, CVSS 8.2amended

changedetection.io project has an XXE vulnerability

CVE-2026-41895GHSA-v7cp-2cx9-x793

What to do

Vendor response not established. Follow the primary source's mitigation guidance and check back for a fix.

This page has no inventory attached, so it cannot say whether you are affected. A vendor fix is not proof that your deployment is fixed.

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Affected packages

  • PyPI changedetection-io

    Affected
    <= 0.54.9
    Fixed in
    no fixed version recorded

Sources

Severity and exploitation
Exploitation
No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.
CVSS 4.0
8.2 · CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N · score source
EPSS
  • CVE-2026-41895: 0.27% estimated exploitation activity in the next 30 days; percentile 18.82 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.
Source description

As published by the source; long descriptions are shortened.

changedetection.ioXXE01 Vulnerability Report: We discovered a XXE vulnerability in the changedetection.io project While analyzing the code logic, it was determined that an area may lead to unintended behavior under specific conditions. With the project's security in mind, see the analysis results to discern whether this may indicate a potential security risk. Overview - SOURCEVERSION: 0.54.9 (9f3a9fdc18bba404244801e5df8109e213ce9ff4) - Vulnerability type: XXE - Finding title: XML XPath helpers parse untrusted XML with entity resolution left to lxml defaults - Affected location: changedetectionio/htmltools.py:287 Root Cause xpathfilter() switches to XML mode for XML/RSS content and creates etree.XMLParser(stripcdata=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(...). Source-to-Sink Chain 1. Untrusted XML/RSS response content is fetched from…

Dates and revisions
Published by the source
Last modified by the source
Source last checked
  1. Revision 3 · amended ·

    Amended from ghsa record GHSA-v7cp-2cx9-x793

  2. Revision 2 · amended ·

    Reviewed OSV alias/range/CVSS4 correction; package source scopes and original publication preserved. No customer finding resolved.

  3. Revision 1 · created ·

    Published from osv record GHSA-v7cp-2cx9-x793

Agent brief

Preview the exact text before you copy it. Commands are read-only suggestions; review them before running anything.

# Patch Next advisory brief: CVE-2026-41895

Advisory: changedetection.io project has an XXE vulnerability
IDs: CVE-2026-41895, GHSA-v7cp-2cx9-x793
Record: https://patchnext.com/advisories/cve-2026-41895 (revision 3, source checked 26 Oct 2026, 13:42 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: High (CVSS 8.2)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor response not established. A vendor fix does not mean a deployment is fixed.

## Affected components
- PyPI changedetection-io: affected <= 0.54.9

## Suggested inspection (read-only)
- `python -m pip show changedetection-io`: prints the installed version. Run with the environment that serves production active.

## Supported action
No complete vendor fix is recorded. Follow the primary source's mitigation guidance and check this record again before closing anything.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on changedetection-io.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://osv.dev/vulnerability/GHSA-v7cp-2cx9-x793 (OSV record GHSA-v7cp-2cx9-x793 lists affected ranges: PyPI changedetection-io >=0 <=0.54.9)
- Verified: https://github.com/advisories/GHSA-v7cp-2cx9-x793 (GitHub-reviewed advisory GHSA-v7cp-2cx9-x793 lists affected ranges: PyPI changedetection-io >=0 <=0.54.9)

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