---
id: CVE-2026-55163
title: Lemur manages TLS certificate creation
summary: >-
  Lemur manages TLS certificate creation. Prior to 1.9.2, PUT /api/1/roles/ in
  lemur/roles/views.py:298 authorized updates with
  RoleMemberPermission(role_id), which allowed either an administrator or any
  existing member of the target role.…
severity: medium
cvss: 6.3
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L'
cwe:
  - CWE-863
vendor: lemur
product: lemur
affected:
  - lemur <= 1.9.1
patched:
  - lemur 1.9.2
published: '2026-08-18'
updated: '2026-09-08'
sourceUpdated: '2026-09-08T21:02:26.047'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-55163'
references:
  - url: >-
      https://github.com/Netflix/lemur/commit/9523a3b9cb3170ec9f795162b8c60e1ad3c4f9ce
    label: security-advisories@github.com
  - url: 'https://github.com/Netflix/lemur/releases/tag/v1.9.2'
    label: security-advisories@github.com
  - url: 'https://github.com/Netflix/lemur/security/advisories/GHSA-x3vf-mgxj-7785'
    label: security-advisories@github.com
  - url: 'https://github.com/advisories/GHSA-x3vf-mgxj-7785'
tags:
  - nvd
  - ghsa
  - pip
epss: 0.00216
epssPercentile: 0.10733
ecosystem: pip
ingestedAt: '2026-06-26T16:43:14.206Z'
---

## Overview

Lemur manages TLS certificate creation. Prior to 1.9.2, PUT /api/1/roles/ in lemur/roles/views.py:298 authorized updates with RoleMemberPermission(role_id), which allowed either an administrator or any existing member of the target role. The handler passed data["users"] and data["name"] to service.update, allowing a non-admin member to add or remove other users and rename the role. This enabled lateral privilege grants within roles that control certificate and authority access and could deny access by removing legitimate members. The DELETE handler already required admin_permission, confirming that the weaker PUT authorization was inconsistent. The fix applies the same administrator-only requirement to the PUT handler. This issue is fixed in version 1.9.2.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

## Package advisory (CVE-2026-55163)

Affected packages:

- `lemur <= 1.9.1`

Patched in:

- `lemur 1.9.2`

Source: https://github.com/advisories/GHSA-x3vf-mgxj-7785