CVE-2026-44304: CWE-90: Improper Neutralization of Special Elements used in an LDAP Query ('LDAP Injection') in Netflix lemur
Lemur manages TLS certificate creation. Prior to 1.9.0, Lemur's LDAP authentication module (lemur/auth/ldap.py) constructs LDAP search filters using unsanitized user input via Python string interpolation. An authenticated LDAP user can inject LDAP filter metacharacters through the username field to manipulate group membership queries and escalate their privileges to administrator. This vulnerability is fixed in 1.9.0.
AI Analysis
Technical Summary
Netflix Lemur versions before 1.9.0 contain an LDAP injection vulnerability (CWE-90) in the LDAP authentication module (lemur/auth/ldap.py). The vulnerability is due to constructing LDAP search filters with unsanitized user input using Python string interpolation. This flaw enables an authenticated LDAP user to inject special LDAP filter characters in the username field, potentially manipulating group membership queries and escalating privileges to administrator. The vulnerability is addressed in Lemur version 1.9.0.
Potential Impact
Successful exploitation allows an authenticated LDAP user to escalate privileges to administrator by manipulating LDAP group membership queries. This can lead to unauthorized administrative access within Lemur, compromising the integrity and security of TLS certificate management.
Mitigation Recommendations
Upgrade Lemur to version 1.9.0 or later, where this LDAP injection vulnerability is fixed. Since no official patch link or advisory is provided, verify the upgrade from the vendor's official release notes or repository. Patch status is not explicitly confirmed beyond the stated fix in version 1.9.0, so confirm remediation by upgrading.
CVE-2026-44304: CWE-90: Improper Neutralization of Special Elements used in an LDAP Query ('LDAP Injection') in Netflix lemur
Description
Lemur manages TLS certificate creation. Prior to 1.9.0, Lemur's LDAP authentication module (lemur/auth/ldap.py) constructs LDAP search filters using unsanitized user input via Python string interpolation. An authenticated LDAP user can inject LDAP filter metacharacters through the username field to manipulate group membership queries and escalate their privileges to administrator. This vulnerability is fixed in 1.9.0.
CVSS v3.1
Score 8.1high
Affected software
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
Netflix Lemur versions before 1.9.0 contain an LDAP injection vulnerability (CWE-90) in the LDAP authentication module (lemur/auth/ldap.py). The vulnerability is due to constructing LDAP search filters with unsanitized user input using Python string interpolation. This flaw enables an authenticated LDAP user to inject special LDAP filter characters in the username field, potentially manipulating group membership queries and escalating privileges to administrator. The vulnerability is addressed in Lemur version 1.9.0.
Potential Impact
Successful exploitation allows an authenticated LDAP user to escalate privileges to administrator by manipulating LDAP group membership queries. This can lead to unauthorized administrative access within Lemur, compromising the integrity and security of TLS certificate management.
Mitigation Recommendations
Upgrade Lemur to version 1.9.0 or later, where this LDAP injection vulnerability is fixed. Since no official patch link or advisory is provided, verify the upgrade from the vendor's official release notes or repository. Patch status is not explicitly confirmed beyond the stated fix in version 1.9.0, so confirm remediation by upgrading.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-05-05T17:39:31.113Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a03a0decbff5d86101d5c8f
Added to database: 05/12/2026, 21:51:26 UTC
Last enriched: 05/20/2026, 18:51:39 UTC
Last updated: 07/31/2026, 19:22:59 UTC
Views: 86
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