# CVE-2026-44405: Paramiko rsakey.py allows the SHA-1 algorithm

> The Paramiko library allows the use of the weak SHA-1 algorithm, potentially enabling cryptographic attacks against SSH connections.

- **Severity:** Low 3.4 (`CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:N/I:L/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 5 May 2026
- **Updated:** 6 May 2026
- **Also known as:** CLEANSTART-2026-IK87467, CLSA-2026-1781571264, DEBIAN-CVE-2026-44405, GHSA-r374-rxx8-8654, MINI-237c-w7mc-4f4h, MINI-7gc9-hjff-q2j8, MINI-7q9g-5w5h-624r, MINI-8w8g-7hh3-8x57, MINI-g853-xx89-pq37, MINI-wmf6-vv5v-v32m, PYSEC-2026-2858, SUSE-SU-2026:22192-1, SUSE-SU-2026:3031-1, SUSE-SU-2026:3093-1, SUSE-SU-2026:4618-1, UBUNTU-CVE-2026-44405, openSUSE-SU-2026:21127-1

## What is CVE-2026-44405?

CVE-2026-44405 is a low-severity vulnerability in Paramiko, published on 5 May 2026. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

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

Weakness: CWE-327 (Use of a Broken or Risky Cryptographic Algorithm)

## Which versions are affected by CVE-2026-44405?

3 open source packages ship an affected version, including paramiko.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `paramiko` | PyPI | All versions to 4.0.0 | None |
| `paramiko` | PyPI | All versions to 4.0.0 | None |
| `paramiko` | PyPI | All versions to 4.0.0 | None |
| `python3-paramiko` | SUSE:Linux Enterprise Module for Basesystem 15 SP7 | All versions | 3.4.0-150400.9.9.1 |
| `python-paramiko` | SUSE:Linux Enterprise Module for Public Cloud 15 SP4 | All versions | 3.4.0-150400.13.13.1 |
| `python-paramiko` | SUSE:Linux Enterprise Module for Python 3 15 SP7 | All versions | 3.5.1-150700.20.6.1 |
| `python-paramiko` | SUSE:Linux Enterprise Server 16.0 | All versions | 3.5.1-160000.3.1 |
| `python-paramiko` | SUSE:Linux Enterprise Server for SAP applications 16.0 | All versions | 3.5.1-160000.3.1 |
| `python-paramiko` | openSUSE:Leap 16.0 | All versions | 3.5.1-160000.3.1 |

## How do I fix CVE-2026-44405?

Apply the vendor's patch.

## Is CVE-2026-44405 being exploited?

There is no known exploitation of CVE-2026-44405 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-44405 and fix it if it is affected.

What it is: CVE-2026-44405 is a low-severity vulnerability in Paramiko, published on 5 May 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-44405 in the wild and no public exploit code.

Affected packages and fixed versions:
- paramiko (PyPI): affected all versions up to 4.0.0; no fix listed
- paramiko (PyPI): affected all versions up to 4.0.0; no fix listed
- paramiko (PyPI): affected all versions up to 4.0.0; no fix listed

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-44405/ (Markdown: https://insights.sbomify.com/CVE-2026-44405/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-44405
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-44405
- OSV: https://osv.dev/vulnerability/CVE-2026-44405

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-44405/
Summaries are generated and may contain mistakes; the official description above is the record.