CVE-2026-44304

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.

PUBLISHED Reserved 2026-05-05 | Published 2026-05-12 | Updated 2026-05-14 | Assigner GitHub_M

Problem types

CWE-90: Improper Neutralization of Special Elements used in an LDAP Query ('LDAP Injection')

Product status

References

github.com/.../lemur/security/advisories/GHSA-3r34-vq8m-39gh exploit

github.com/.../lemur/security/advisories/GHSA-3r34-vq8m-39gh

cve.org (CVE-2026-44304)

nvd.nist.gov (CVE-2026-44304)

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