---
id: "CVE-2026-44405"
page: "https://infrastack.ai/live/CVE-2026-44405"
kind: "vulnerability"
aliases: ["CVE-2026-44405", "GHSA-r374-rxx8-8654"]
title: "Paramiko rsakey.py allows the SHA-1 algorithm"
severity: "low"
cvss: 3.4
epss: 0.00114
exploited: false
status: "open"
category: "package"
products: [{"name": "paramiko", "fixed": ["5.0.0"], "affected": "< 5.0.0", "ecosystem": "pypi"}]
ecosystems: ["pypi"]
tags: ["cwe-327", "package", "paramiko", "python", "ssh"]
not_affected_if: ["no-rsa-keys-used", "paramiko-5-or-later"]
published_at: "2026-05-06T00:16:04+00:00"
first_seen_at: "2026-11-07T00:25:02+00:00"
updated_at: "2026-11-07T00:44:49+00:00"
sources: [{"source": "ghsa", "url": "https://github.com/advisories/GHSA-r374-rxx8-8654", "first_seen_at": "2026-11-07T00:25:02+00:00"}, {"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-44405", "first_seen_at": "2026-11-07T00:44:49+00:00"}]
exploit_sources: [{"type": "epss", "score": 0.00114, "url": "https://api.first.org/data/v1/epss?cve=CVE-2026-44405"}]
---

# Paramiko rsakey.py allows the SHA-1 algorithm

Link for people: https://infrastack.ai/live/CVE-2026-44405 (this .md is for agents)

Paramiko, a Python SSH library, still allows the SHA-1 hash algorithm in its RSA key handling. An attacker who can influence the signature exchange may be able to exploit SHA-1 weaknesses against connections made with it.

_Summary, check and fix written by a model from the sources; labelled as such._

## Affected

- pypi:paramiko affected < 5.0.0 fixed 5.0.0

## How to check

- Check the installed Paramiko version with `pip show paramiko` and compare it to the affected range below the fix line.
- Search the codebase for `paramiko` to find services that use it for SSH connections.

## Fix

- Paramiko: move to `5.0.0` or later.

## Timeline

- 2026-11-07T00:25:02+00:00 ghsa https://github.com/advisories/GHSA-r374-rxx8-8654
- 2026-11-07T00:44:49+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-44405

## Documents

- [fix] Patch: github.com https://github.com/paramiko/paramiko/commit/a4489456b6f65281e172380cc4826cee5e851dbb

## From the sources

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

---

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