What is CVE-2026-35490?

CVE-2026-35490 is a critical-severity vulnerability in Dgtlmoon Changedetection.io, classified under Incorrect Authorization. CVSS score: 9.8/10. Published 2026-04-07.

How severe is CVE-2026-35490?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Auth bypass in Dgtlmoon Changedetection.io

CVE-2026-35490

changedetection.io is a free open source web page change detection tool. Prior to 0.54.8, the @login_optionally_required decorator is placed before (outer to) @blueprint.route() instead of after it. In Flask, @route() must be the outermost…

Vulnerability class: Broken Access Control

EPSS: 0.005 (41.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Dgtlmoon Changedetection.io — versions < 0.54.8
Webtechnologies Changedetection

Weakness classification (CWE)

CWE-863 — Incorrect Authorization

References

security-advisories@github.com (x_refsource_CONFIRM, Exploit, Mitigation, Vendor Advisory)

Frequently asked questions

What is CVE-2026-35490?: CVE-2026-35490 is a critical-severity vulnerability in Dgtlmoon Changedetection.io, classified under Incorrect Authorization. CVSS score: 9.8/10. Published 2026-04-07.
How severe is CVE-2026-35490?: Critical severity. CVSS v3 base score is 9.8 out of 10.