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OpenAdvisories
High · 8.1 CVE-2026-44304 EUVD-2026-29864GHSA-3r34-vq8m-39ghPYSEC-2026-2585

Lemur: LDAP Filter Injection enables post-authentication privilege escalation

Published May 12, 2026 · Updated May 14, 2026 · Assigned by GitHub_M

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.

Affected products

VendorProductAffectedFixed
Netflix lemur < 1.9.0 —

Affected packages

EcosystemPackageAffectedFixedRecord
PyPI lemur < 1.9.0 1.9.0 GHSA-3r34-vq8m-39gh

References