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: 2026-05-12
Score: 8.1 High
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories
Source ID Title
Github GHSA Github GHSA GHSA-3r34-vq8m-39gh Lemur: LDAP Filter Injection enables post-authentication privilege escalation
History

Thu, 14 May 2026 13:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Wed, 13 May 2026 00:15:00 +0000

Type Values Removed Values Added
First Time appeared Netflix
Netflix lemur
Vendors & Products Netflix
Netflix lemur

Tue, 12 May 2026 22:00:00 +0000

Type Values Removed Values Added
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.
Title Lemur: LDAP Filter Injection enables post-authentication privilege escalation
Weaknesses CWE-90
References
Metrics cvssV3_1

{'score': 8.1, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N'}


cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-05-14T12:33:51.765Z

Reserved: 2026-05-05T17:39:31.113Z

Link: CVE-2026-44304

cve-icon Vulnrichment

Updated: 2026-05-14T12:33:42.852Z

cve-icon NVD

Status : Deferred

Published: 2026-05-12T22:16:37.140

Modified: 2026-05-14T13:16:19.473

Link: CVE-2026-44304

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-05-13T00:00:16Z

Weaknesses