What is CVE-2026-31881?

CVE-2026-31881 is a high-severity vulnerability in Runtipi, classified under Missing Authentication for Critical Function. CVSS score: 7.7/10. Published 2026-03-11.

How severe is CVE-2026-31881?

High severity. CVSS v3 base score is 7.7 out of 10.

Auth bypass in Runtipi

CVE-2026-31881

Runtipi is a personal homeserver orchestrator. Prior to 4.8.0, an unauthenticated attacker can reset the operator (admin) password when a password-reset request is active, resulting in full account takeover. The endpoint POST /api/auth/reset-password is exposed without authentication/authorization checks. During the 15-minute reset window, any remote user can set a new operator password and log in as admin. This vulnerability is fixed in 4.8.0.

Vulnerability class: Broken Authentication

EPSS: 0.004 (35.3th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.7 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L.

Affected products

Runtipi — versions < 4.8.0

Weakness classification (CWE)

CWE-306 — Missing Authentication for Critical Function

References

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

Frequently asked questions

What is CVE-2026-31881?: CVE-2026-31881 is a high-severity vulnerability in Runtipi, classified under Missing Authentication for Critical Function. CVSS score: 7.7/10. Published 2026-03-11.
How severe is CVE-2026-31881?: High severity. CVSS v3 base score is 7.7 out of 10.