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CVE-2026-55163

CVE-2026-55163 · Lemur: Privilege escalation via PUT /api/1/roles/<id> — non-admin role members can rewrite role membership

This page contains facts from public vulnerability sources. Check the original advisory before updating.

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.

CVSS 6.3 · Medium · EPSS 0.2% · Fix available

Published
Updated

Stack: python

Affected products and versions

  • lemur

    Versions
    • < 1.9.2: Affected

    No fix published

  • lemur PyPI

    Versions
    • 0.11.0
    • 0.2.1
    • 0.8.0
    • 0.8.1
    • 0.9.0
    • 1.0.0
    • 1.1.0
    • 1.2.0
    • 1.3.1
    • 1.3.2
    • 1.4.0
    • 1.5.0
    • 1.6.0
    • 1.7.0
    • 1.8.0
    • 1.8.1
    • 1.8.2
    • 1.9.0
    • 1.9.1
    Affected ranges
    • ECOSYSTEM: < 1.9.2

    Update to 1.9.2

Original sources

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