CVE-2026-44304— Lemur: LDAP Filter Injection enables post-authentication privilege escalation
Possible ATT&CK Techniques 2AI
T1548.002 · Bypass User Account Control T1068 · Exploitation for Privilege EscalationGet alerts for future matching vulnerabilitiesLog in to subscribe
I. Basic Information for CVE-2026-44304
Vulnerability Information
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Vulnerability Title
Lemur: LDAP Filter Injection enables post-authentication privilege escalation
Source: NVD (National Vulnerability Database)
Vulnerability 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.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
LDAP查询中使用的特殊元素转义处理不恰当(LDAP注入)
Source: NVD (National Vulnerability Database)
Vulnerability Title
lemur 注入漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
lemur是Netflix, Inc.开源的一个TLS证书管理工具。 lemur 1.9.0之前版本存在注入漏洞，该漏洞源于LDAP认证模块使用未清理的用户输入构建LDAP搜索过滤器，可能导致LDAP过滤器注入和权限提升。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
II. Public POCs for CVE-2026-44304
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- https://github.com/Netflix/lemur/security/advisories/GHSA-3r34-vq8m-39ghx_refsource_CONFIRM
- https://nvd.nist.gov/vuln/detail/CVE-2026-44304
IV. Related Vulnerabilities
Same vendor: Netflix
- CVE-2026-44305
Lemur: LDAP TLS certificate verification globally disabled e - CVE-2024-9301
Netflix e2nest 安全漏洞 - CVE-2024-7093
Server-Side Template Injection in Dispatch Message Templates - CVE-2024-5023
Arbitrary File Read Vulnerability in ConsoleMe via Limited G - CVE-2024-4701
Path Traversal vulnerability via File Uploads in Genie
Same weakness: CWE-90
V. Comments for CVE-2026-44304
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