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TI-2026-22073 Aliases CVE-2026-27696GHSA-3c45-4pj5-ch7m

changedetection.io Vulnerable to Server-Side Request Forgery (SSRF) via Watch URLs

Priority HIGH 76CWE-918Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Information disclosure
Confidentiality · integrity · availability
High · None · None
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-918 and the CVSS impact.

Summary

changedetection.io is a free open source web page change detection tool. In versions prior to 0.54.1, changedetection.io is vulnerable to Server-Side Request Forgery (SSRF) because the URL validation function `is_safe_valid_url()` does not validate the resolved IP address of watch URLs against private, loopback, or link-local address ranges. An authenticated user (or any user when no password is configured, which is the default) can add a watch for internal network URLs. The application fetches these URLs server-side, stores the response content, and makes it viewable through the web UI — enabling full data exfiltration from internal services. Version 0.54.1 contains a fix for the issue.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00495 42nd percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed changedetection.io (dgtlmoon): 0.54.1changedetection.io (PyPI): 0.54.1

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
dgtlmoonchangedetection.iobefore 0.54.10.54.1Patch availableCNA
—changedetection.io (PyPI)before 0.54.10.54.1Patch availableGHSA-3c45-4pj5-ch7m
  • changedetection.io Vendordgtlmoon Affected before 0.54.1 Fixed in 0.54.1 Patch available CNA
  • changedetection.io (PyPI) Vendor— Affected before 0.54.1 Fixed in 0.54.1 Patch available GHSA-3c45-4pj5-ch7m

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:webtechnologies:changedetection:*:*:*:*:*:*:*:*before 0.54.1Vulnerabledgtlmoon
  • cpe:2.3:a:webtechnologies:changedetection:*:*:*:*:*:*:*:* Versions before 0.54.1 Vulnerable ·dgtlmoon

Remediation

  • Fix · CNA changedetection.io (dgtlmoon) Fixed in 0.54.1
  • Fix · GHSA-3c45-4pj5-ch7m changedetection.io (PyPI) Fixed in 0.54.1 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-27696
  2. 2026-10-03 Alias added: GHSA-3c45-4pj5-ch7m

References

Exploit 1

Patch 1

Advisory 1

Other 1

  • TI-2026-27619 changedetection.io has an Authentication Bypass via Decorator Ordering CVSS 3.1CRITICAL 9.8
  • TI-2026-23210 changedetection.io: Zip Slip vulnerability in the backup restore functionality CVSS 4.0HIGH 8.8
  • TI-2026-26322 Changedetection.io Discloses Environment Variables via jq env Builtin in Include Filters CVSS 4.0HIGH 8.3
  • TI-2026-23185 changedetection.io: XPath - Arbitrary File Read via unparsed-text() CVSS 4.0HIGH 8.8
  • TI-2026-31955 changedetection.io: Arbitrary Local File Read via crafted backup restore CVSS 3.1HIGH 7.5
  • TI-2026-23184 changedetection.io: Reflected XSS in RSS Tag Error Response CVSS 3.1MEDIUM 6.1
See all 12 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences