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Vulnerability · Published May 14, 2026 · Assigned by GitHub_M

CVE-2026-44671ZITADEL: LDAP Filter Injection in Login Flow

High 7.5

In plain English

A high-severity security flaw in zitadel from zitadel. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 42% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)7.5High
Exploit odds (30 days)0.5%top 58.5% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official description

ZITADEL is an open source identity management platform. From 2.71.11 to before 3.4.10 and 4.15.0, a vulnerability was discovered in Zitadel's LDAP identity provider implementation, which fails to properly escape user-provided usernames before incorporating them into LDAP search filters. This allows unauthenticated attackers to perform LDAP Filter Injection during the login process. While this vulnerability does not allow for a full authentication bypass, an attacker can use LDAP metacharacters (such as *, (, )) to perform blind LDAP injection. By observing the different failure (or success) responses, an attacker can systematically enumerate valid usernames and extract sensitive attribute data from the connected LDAP directory. This vulnerability is fixed in 3.4.10 and 4.15.0.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Gogithub.com/zitadel/zitadel4.15.0GHSA-rxvx-hhpj-q6px
Gogithub.com/zitadel/zitadelno fix listedGHSA-rxvx-hhpj-q6px
Gogithub.com/zitadel/zitadel3.4.10GHSA-rxvx-hhpj-q6px
Gogithub.com/zitadel/zitadelno fix listedGO-2026-5648
Gogithub.com/zitadel/zitadelno fix listedGO-2026-5648
Gogithub.com/zitadel/zitadelno fix listedGO-2026-5648

Affected products (as reported)

VendorProductVersions
zitadel zitadel >= 2.71.11, < 3.4.10>= 4.0.0, < 4.15.0

Weakness: CWE-90 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

References