What is CVE-2026-40295?

CVE-2026-40295 is a medium-severity vulnerability in Heartcombo Devise, classified under URL Redirection to Untrusted Site (Open Redirect). CVSS score: 6.1/10. Published 2026-05-22.

How severe is CVE-2026-40295?

Medium severity. CVSS v3 base score is 6.1 out of 10.

Open Redirect in Heartcombo Devise

CVE-2026-40295

Devise is an authentication solution for Rails based on Warden. In versions 5.0.3 and below, when the Timeoutable module is enabled in Devise, the FailureApp#redirect_url method returns request.referrer — the HTTP Referer header, which is…

Vulnerability class: Open Redirect

EPSS: 0.001 (20.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

Affected products

Heartcombo Devise — versions < 5.0.4

Weakness classification (CWE)

CWE-601 — URL Redirection to Untrusted Site (Open Redirect)

References

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

Frequently asked questions

What is CVE-2026-40295?: CVE-2026-40295 is a medium-severity vulnerability in Heartcombo Devise, classified under URL Redirection to Untrusted Site (Open Redirect). CVSS score: 6.1/10. Published 2026-05-22.
How severe is CVE-2026-40295?: Medium severity. CVSS v3 base score is 6.1 out of 10.