LDAP Injection in Zitadel
CVE-2026-44671
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.006 (48.5th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 48th percentile — 48.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.006 · change: +0.001
Affected products
- Zitadel — versions >= 2.71.11, < 3.4.10, >= 4.0.0, < 4.15.0
Weakness classification (CWE)
References
- github.com/zitadel/zitadel/security/advisories/GHSA-rxvx-hhpj-q6px (Patch, Mitigation, Vendor Advisory)
- github.com/zitadel/zitadel/releases/tag/v3.4.10 (Product, Release Notes)
- github.com/zitadel/zitadel/releases/tag/v4.15.0 (Product, Release Notes)
Frequently asked questions
- What is CVE-2026-44671?
- CVE-2026-44671 is a high-severity vulnerability in Zitadel, classified under LDAP Injection. CVSS score: 7.5/10. Published 2026-05-14.
- How severe is CVE-2026-44671?
- High severity. CVSS v3 base score is 7.5 out of 10.