Skip to main content

Changedetection CVE-2026-27696

HIGH
Server-Side Request Forgery (SSRF) (CWE-918)
2026-02-25 security-advisories@github.com GHSA-3c45-4pj5-ch7m
SSRF Changedetection
8.6
CVSS 3.1 · GitHub Advisory
Share

Severity by source

GitHub Advisory PRIMARY
8.6 HIGH
AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N

Primary rating from GitHub Advisory · only source for this CVE.

CVSS VectorGitHub Advisory

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Changed
Confidentiality
High
Integrity
None
Availability
None

Lifecycle Timeline

4
Analysis Generated
Mar 12, 2026 - 21:55 vuln.today
PoC Detected
Feb 26, 2026 - 15:34 vuln.today
Public exploit code
Patch released
Feb 26, 2026 - 15:34 nvd
Patch available
CVE Published
Feb 25, 2026 - 05:17 nvd
HIGH 8.6

DescriptionGitHub Advisory

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.

AnalysisAI

changedetection.io is a free open source web page change detection tool. [CVSS 8.6 HIGH]

Unlock full vulnerability intelligence

  • Risk assessment & exploitation conditions
  • Attack chain visualization
  • Remediation with exact patch versions
  • Threat intelligence from 22 sources
  • Personal watchlist & email alerts
Continue with Google Continue with GitHub

Free forever · No credit card required

Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
Add watch URL with internal IP address
Exploit
Application resolves domain to private IP
Execution
Server fetches internal resource
Impact
Response content stored and exposed via web UI
Sign in to reveal

Vulnerability AssessmentAI

Exploitation changedetection.io versions prior to 0.54.1 with default configuration (no password protection). … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment CVSS 8.6 (HIGH). … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario A remote attacker (requires authentication) could exploit this vulnerability to compromise the affected system.
Remediation A vendor patch is available — apply it immediately. … Detailed patch versions, workarounds, and compensating controls in full report.
Sign in to read full assessment

Recommended ActionAI

Within 24 hours: Identify all changedetection.io instances in your environment and assess current version/patch status. …

Sign in for detailed remediation steps and compensating controls.

Threat intelligence, references, and detailed analysis are available after sign-in.

Share

CVE-2026-27696 vulnerability details – vuln.today
Back

This site uses cookies essential for authentication and security. No tracking or analytics cookies are used. Privacy Policy