CVE-2026-44671Network attack vector

Unauthenticated directory disclosure via unescaped LDAP username

Published May 14, 2026 · Updated May 14, 2026

LDAP injection in ZITADEL 2.71.11 through 3.4.9 and 4.0.0 through 4.14.0 allows remote attackers to disclose LDAP directory data. The LDAP provider's userFiltersToSearchQuery function concatenates the raw login username into attribute filters instead of escaping LDAP metacharacters. An LDAP identity-provider integration must be enabled; differing login responses expose valid usernames and associated attributes without bypassing authentication.

CVSS severity7.5
High
EPSS probability0.48%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

LDAP injection in ZITADEL 2.71.11 through 3.4.9 and 4.0.0 through 4.14.0 allows remote attackers to disclose LDAP directory data. The LDAP provider's userFiltersToSearchQuery function concatenates the raw login username into attribute filters instead of escaping LDAP metacharacters. An LDAP identity-provider integration must be enabled; differing login responses expose valid usernames and associated attributes without bypassing authentication.

The record

CVE
CVE-2026-44671
Published
May 14, 2026
Updated
May 14, 2026
Vendor
ZITADEL
Product
ZITADEL
Classifications
CWE-90, T1589
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 14, 2026CVE publishedPublication date reported by the CVE source.
  2. May 14, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=>= 2.71.11, < 3.4.10
  2. Affected versionversion=>= 4.0.0, < 4.15.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

ZITADEL · ZITADELversion=>= 2.71.11, < 3.4.10; version=>= 4.0.0, < 4.15.0

Published CVSS scores

7.5GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-90Improper Neutralization of Special Elements used in an LDAP Query ('LDAP Injection')
T1589Gather Victim Identity Information

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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