---
id: CVE-2026-71317
title: Lemur manages TLS certificate creation
summary: >-
  Lemur manages TLS certificate creation. Prior to 1.9.3, POST
  /api/1/authorities with type=subca did not require AuthorityPermission on the
  parent authority when ADMIN_ONLY_AUTHORITY_CREATION was false.
  AssociatedAuthoritySchema resolved …
severity: medium
cvss: 6.5
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:N'
cwe:
  - CWE-862
vendor: lemur
product: lemur
affected:
  - lemur <= 1.9.2
patched:
  - lemur 1.9.3
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-2026-71317'
references:
  - url: >-
      https://github.com/Netflix/lemur/commit/8669011203ca3dd89d9e39bab9ef6850eca723f9
    label: security-advisories@github.com
  - url: 'https://github.com/Netflix/lemur/releases/tag/v1.9.3'
    label: security-advisories@github.com
  - url: 'https://github.com/Netflix/lemur/security/advisories/GHSA-g7p5-89mh-248h'
    label: security-advisories@github.com
  - url: 'https://github.com/Netflix/lemur/security/advisories/GHSA-g7p5-89mh-248h'
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
  - url: 'https://github.com/advisories/GHSA-g7p5-89mh-248h'
tags:
  - nvd
  - ghsa
  - pip
epss: 0.00105
epssPercentile: 0.0099
aliases:
  - GHSA-g7p5-89mh-248h
ecosystem: pip
ingestedAt: '2026-08-18T21:22:59.652Z'
---

## Overview

Lemur manages TLS certificate creation. Prior to 1.9.3, POST /api/1/authorities with type=subca did not require AuthorityPermission on the parent authority when ADMIN_ONLY_AUTHORITY_CREATION was false. AssociatedAuthoritySchema resolved the caller-supplied parent and passed it through authority creation to cryptography-issuer, which used the parent authority_certificate.private_key to sign a new intermediate. Any authenticated non-read-only user in that supported configuration could chain a sub-CA to an internal root for which the user held no role. The resulting intermediate could issue trusted certificates and its private key could be used outside Lemur, bypassing normal issuance controls. The fix checks AuthorityPermission on every supplied parent before invoking the issuer. This issue is fixed in version 1.9.3.

## Remediation

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

## Package advisory (CVE-2026-71317)

Affected packages:

- `lemur <= 1.9.2`

Patched in:

- `lemur 1.9.3`

Source: https://github.com/advisories/GHSA-g7p5-89mh-248h