---
id: CVE-2026-55164
title: Lemur manages TLS certificate creation
summary: >-
  Lemur manages TLS certificate creation. Prior to 1.9.2,
  lemur.users.service.update assigned a replacement password directly to
  users.password, while lemur/users/models.py registered User.hash_password only
  for the before_insert event. Be…
severity: medium
cvss: 4.9
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N'
cwe:
  - CWE-256
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-2026-55164'
references:
  - url: >-
      https://github.com/Netflix/lemur/commit/221c6d7275ac667bb8898ab48d2b96926a89c1c4
    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-q437-g7fv-2jvv'
    label: security-advisories@github.com
  - url: 'https://github.com/Netflix/lemur/security/advisories/GHSA-q437-g7fv-2jvv'
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
  - url: 'https://github.com/advisories/GHSA-q437-g7fv-2jvv'
tags:
  - nvd
  - ghsa
  - pip
epss: 0.00289
epssPercentile: 0.19149
ecosystem: pip
ingestedAt: '2026-06-26T16:43:14.205Z'
---

## Overview

Lemur manages TLS certificate creation. Prior to 1.9.2, lemur.users.service.update assigned a replacement password directly to users.password, while lemur/users/models.py registered User.hash_password only for the before_insert event. Because no before_update listener ran, administrator-initiated password changes through PUT /api/1/users/ were committed as plaintext. The affected user could no longer authenticate normally because bcrypt verification received an unhashed value. A database, backup, replica, query-log, or administrative read compromise exposed immediately usable credentials without offline cracking. The fix registers hashing for before_update and avoids rehashing values that already have a bcrypt prefix. 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-2026-55164)

Affected packages:

- `lemur <= 1.9.1`

Patched in:

- `lemur 1.9.2`

Source: https://github.com/advisories/GHSA-q437-g7fv-2jvv