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CVE-2026-31881

Runtipi authentication bypass

7.7 HIGHPublic exploitEPSS 0.66%
  1. Published11 Mar 2026

Description

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.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityHigh
Privileges requiredNone
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityLow
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L

Affected products

Runtipi< 4.8.0

Remediation

Fixed in
Runtipi≥ 4.8.0

References

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Frequently asked

Is CVE-2026-31881 being actively exploited?

CVE-2026-31881 is not in the CISA KEV catalog. A public exploit reference exists, so treat it as exploitable. Its EPSS exploit probability is 0.66%.

How severe is CVE-2026-31881?

CVE-2026-31881 has a CVSS 3.1 base score of 7.7, rated high. EPSS estimates a 0.66% probability of exploitation.

Which products are affected by CVE-2026-31881?

Affected products include Runtipi.

How do I fix CVE-2026-31881?

Upgrade affected software to a fixed version, for example Runtipi 4.8.0 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2026-31881 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.