---
id: CVE-2026-44405
aliases:
  - GHSA-r374-rxx8-8654
  - PYSEC-2026-2858
title: Paramiko rsakey.py allows the SHA-1 algorithm
summary: Paramiko rsakey.py allows the SHA-1 algorithm
severity: low
cvss: 3.4
cvssVector: 'CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:N/I:L/A:N'
vendor: paramiko
product: paramiko
ecosystem: pip
affected:
  - paramiko <= 4.0.0
published: '2026-05-06'
updated: '2026-09-10'
sourceUpdated: '2026-09-10T03:51:06.927753035Z'
source: OSV
sourceUrl: 'https://osv.dev/vulnerability/GHSA-r374-rxx8-8654'
references:
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-44405'
  - url: >-
      https://github.com/paramiko/paramiko/commit/a4489456b6f65281e172380cc4826cee5e851dbb
  - url: 'https://github.com/paramiko/paramiko'
  - url: >-
      https://ostif.org/wp-content/uploads/2026/05/25-11-2415-REP_paramiko-security-audit_v1.1.pdf
tags:
  - osv
  - pip
epss: 0.00129
epssPercentile: 0.02092
ingestedAt: '2026-07-13T18:58:02.385Z'
---

## Overview

In Paramiko through 4.0.0 before a448945, rsakey.py allows the SHA-1 algorithm.

## Affected packages

- `paramiko <= 4.0.0`

## Remediation

Refer to the advisory for the patched release.