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TI-2025-39553 Aliases CVE-2025-64102GHSA-xrw9-r35x-x878

Zitadel allows brute-forcing authentication factors

Priority LOW 36CWE-307Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Attack requirements
Present
Impact type
Security bypass
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and GitHub. Impact type from CWE-307.

Summary

Zitadel is open-source identity infrastructure software. Prior to 4.6.0, 3.4.3, and 2.71.18, an attacker can perform an online brute-force attack on OTP, TOTP, and passwords. While Zitadel allows preventing online brute force attacks in scenarios like TOTP, Email OTP, or passwords using a lockout mechanism. The mechanism is not enabled by default and can cause a denial of service for the corresponding user if enabled. Additionally, the mitigation strategies were not fully implemented in the more recent resource-based APIs. This vulnerability is fixed in 4.6.0, 3.4.3, and 2.71.18.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.0037 31st percentileScored 2026-11-08
Fix Fixed zitadel (zitadel): 4.6.0, 3.4.3, 2.71.18github.com/zitadel/zitadel/v2 (Go): 2.71.18+1 more product

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
zitadelzitadel4.0.0-rc.1 to before 4.6.0; 3.0.0-rc.1 to before 3.4.3; 2.0.0 to before 2.71.184.6.0, 3.4.3, 2.71.18Patch availableCNA
—github.com/zitadel/zitadel/v2 (Go)before 2.71.182.71.18Patch availableGHSA-xrw9-r35x-x878
—github.com/zitadel/zitadel (Go)before 1.80.0-v2.20.0.20251029090735-b8db8cdf9cc81.80.0-v2.20.0.20251029090735-b8db8cdf9cc8Patch availableGHSA-xrw9-r35x-x878
  • zitadel Vendorzitadel Affected 4.0.0-rc.1 to before 4.6.0; 3.0.0-rc.1 to before 3.4.3; 2.0.0 to before 2.71.18 Fixed in 4.6.0, 3.4.3, 2.71.18 Patch available CNA
  • github.com/zitadel/zitadel/v2 (Go) Vendor— Affected before 2.71.18 Fixed in 2.71.18 Patch available GHSA-xrw9-r35x-x878
  • github.com/zitadel/zitadel (Go) Vendor— Affected before 1.80.0-v2.20.0.20251029090735-b8db8cdf9cc8 Fixed in 1.80.0-v2.20.0.20251029090735-b8db8cdf9cc8 Patch available GHSA-xrw9-r35x-x878

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:zitadel:zitadel:*:*:*:*:*:*:*:*before 2.71.18; 3.0.0 to before 3.4.3; 4.0.0 to before 4.6.0Vulnerablezitadel
  • cpe:2.3:a:zitadel:zitadel:*:*:*:*:*:*:*:* Versions before 2.71.18; 3.0.0 to before 3.4.3; 4.0.0 to before 4.6.0 Vulnerable ·zitadel

Remediation

  • Fix · CNA zitadel (zitadel) Fixed in 4.6.0, 3.4.3, 2.71.18
  • Fix · GHSA-xrw9-r35x-x878 github.com/zitadel/zitadel/v2 (Go) Fixed in 2.71.18 Advisory →
  • Fix · GHSA-xrw9-r35x-x878 github.com/zitadel/zitadel (Go) Fixed in 1.80.0-v2.20.0.20251029090735-b8db8cdf9cc8 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2025-64102
  2. 2026-10-03 Alias added: GHSA-xrw9-r35x-x878

References

Patch 1

Advisory 2

Other 2

  • TI-2024-26607 ZITADEL Vulnerable to Session Information Leakage CVSS 3.1MEDIUM 6.5
  • TI-2025-41253 ZITADEL Vulnerable to Unauthenticated Full-Read SSRF via V2 Login CVSS 3.1CRITICAL 9.3
  • TI-2025-39554 Zitadel Bypass Second Authentication Factor CVSS 4.0HIGH 8.7
  • TI-2024-33224 Zitadel User Registration Bypass Vulnerability CVSS 3.1HIGH 7.5
  • TI-2024-31388 Service Users Deactivation not Working in Zitadel CVSS 3.1HIGH 8.1
  • TI-2026-23310 ZITADEL: Bypassing Zitadel Login Behavior and Security Policy in Login V2 CVSS 3.1HIGH 8.2
See all 46 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences