High severity · published Oct 21, 2026
CVE-2026-15723
Improper Neutralization of Special Elements used in an LDAP Query ('LDAP Injection') in GitLab
New
8.2
CVSS
0.4%
EPSS
No
On KEV
Description
GitLab has remediated an issue in GitLab CE/EE affecting all versions from 10.1 before 19.3.6, 19.4 before 19.4.3, and 19.5 before 19.5.1 that, when OmniAuth SAML and LDAP auto-linking were both enabled, an authenticated user could have taken over an existing LDAP-backed account without any interaction from the targeted user, due to improper input sanitization in the LDAP email lookup path used during OmniAuth identity linking.
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:N
Attack vector
Network
Complexity
High
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
None
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 36% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
GI
GitLab · GitLab
10.1 before 19.3.6; 19.4 before 19.4.3; 19.5 before 19.5.1 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-15723
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-15723
Release Notes
https://docs.gitlab.com/releases/patches/patch-release-gitlab-19-5-1-released/
Permissions Required
https://gitlab.com/gitlab-org/gitlab/-/work_items/605977
Permissions Required
https://hackerone.com/reports/3852192
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