CVE-2026-44304
HighSummary
Lemur manages TLS certificate creation. Prior to version 1.9.0, Lemur's LDAP authentication module constructs LDAP search filters using unsanitized user input, allowing LDAP users to inject LDAP filter metacharacters.
Risk Assessment
An authenticated LDAP user can manipulate group membership queries, leading to privilege escalation to administrator level. This poses a significant security risk to the system.
Recommendation
It is recommended to upgrade to version 1.9.0 or later to mitigate this vulnerability. Additionally, conducting an audit of existing LDAP user permissions is advisable.
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Original NVD description (English source)
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.