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 module improperly neutralizes special LDAP filter characters by directly interpolating user input into LDAP search filters without sanitization. This flaw enables an authenticated LDAP user to inject malicious LDAP filter elements via the username field, potentially escalating privileges to administrator by manipulating group membership queries. The vulnerability is addressed in Lemur 1.9.0.
Potential Impact
Successful exploitation allows an authenticated LDAP user to escalate their privileges to administrator by injecting LDAP filter metacharacters that manipulate group membership queries. This can lead to unauthorized administrative access within Lemur, compromising TLS certificate management operations. There is no indication of denial of service or data confidentiality impact beyond privilege escalation.
Mitigation Recommendations
Upgrade Lemur to version 1.9.0 or later, where this LDAP injection vulnerability is fixed. Since the vulnerability is resolved in this official release, no additional mitigation steps are required beyond applying the update. Patch status is confirmed fixed in version 1.9.0.
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.
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 module improperly neutralizes special LDAP filter characters by directly interpolating user input into LDAP search filters without sanitization. This flaw enables an authenticated LDAP user to inject malicious LDAP filter elements via the username field, potentially escalating privileges to administrator by manipulating group membership queries. The vulnerability is addressed in Lemur 1.9.0.
Potential Impact
Successful exploitation allows an authenticated LDAP user to escalate their privileges to administrator by injecting LDAP filter metacharacters that manipulate group membership queries. This can lead to unauthorized administrative access within Lemur, compromising TLS certificate management operations. There is no indication of denial of service or data confidentiality impact beyond privilege escalation.
Mitigation Recommendations
Upgrade Lemur to version 1.9.0 or later, where this LDAP injection vulnerability is fixed. Since the vulnerability is resolved in this official release, no additional mitigation steps are required beyond applying the update. Patch status is confirmed fixed in version 1.9.0.
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: 5/12/2026, 9:51:26 PM
Last enriched: 5/12/2026, 10:06:57 PM
Last updated: 5/13/2026, 4:52:22 AM
Views: 7
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