What is CVE-2026-71203?

CVE-2026-71203 is a medium-severity vulnerability in Dgtlmoon Changedetection.io, classified under Missing Authentication for Critical Function. CVSS score: 5.3/10. Published 2026-08-05.

How severe is CVE-2026-71203?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Is CVE-2026-71203 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Auth bypass in Dgtlmoon Changedetection.io

CVE-2026-71203

changedetection.io's REST API resources are protected by an @auth.check_token decorator validating the caller's x-api-key header, except the Spec resource registered at /api/v1/full-spec (changedetectionio/api/Spec.py), whose get method carries neither @auth.check_token nor @validate_openapi_request.

Vulnerability class: Broken Authentication

EPSS: 0.003 (17.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.

Affected products

Dgtlmoon Changedetection.io — versions 0.55.7

Weakness classification (CWE)

CWE-306 — Missing Authentication for Critical Function

Public proof-of-concept exploits

Nel-droid/CVE-2026-71203-PoC

References

309f9ea4-e3e9-4c6c-b79d-e8eb01244f2c (third-party-advisory)

Frequently asked questions

What is CVE-2026-71203?: CVE-2026-71203 is a medium-severity vulnerability in Dgtlmoon Changedetection.io, classified under Missing Authentication for Critical Function. CVSS score: 5.3/10. Published 2026-08-05.
How severe is CVE-2026-71203?: Medium severity. CVSS v3 base score is 5.3 out of 10.
Is CVE-2026-71203 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.