CVE-2018-7750 — Vulnerability in paramiko — CVE Details

CRITICAL

Paramiko not properly checking authentication before processing other requests

Published July 12, 2018Updated June 9, 2026Source: osv

Summary

transport.py in the SSH server implementation of Paramiko before 1.17.6, 1.18.x before 1.18.5, 2.0.x before 2.0.8, 2.1.x before 2.1.5, 2.2.x before 2.2.3, 2.3.x before 2.3.2, and 2.4.x before 2.4.1 does not properly check whether authentication is completed before processing other requests, as demonstrated by channel-open. A customized SSH client can simply skip the authentication step.

Advisory Timeline

First published July 12, 2018 (3014 days ago).
Last revised June 9, 2026 — 2889 days after initial publication.

Remediation

Upgrade to the fixed version using your package manager.

pip

Update paramiko to 2.3.2 or later

pip install "paramiko>=2.3.2"

pip

Update paramiko to 1.18.5 or later

pip install "paramiko>=1.18.5"

pip

Update paramiko to 2.4.1 or later

pip install "paramiko>=2.4.1"

pip

Update paramiko to 1.17.6 or later

pip install "paramiko>=1.17.6"

pip

Update paramiko to 2.0.8 or later

pip install "paramiko>=2.0.8"

pip

Update paramiko to 2.2.3 or later

pip install "paramiko>=2.2.3"

pip

Update paramiko to 2.1.5 or later

pip install "paramiko>=2.1.5"

After upgrading, run your dependency scanner again to confirm the vulnerability is resolved.

Affected Packages (7)

Affects 1 ecosystem: pypi (1).

Package	Ecosystem	Affected	Fixed In
paramiko	pypi	2.3.0, 2.3.1	2.3.2
paramiko	pypi	1.18.0, 1.18.1, 1.18.2, 1.18.3 (+1 more)	1.18.5
paramiko	pypi	2.4.0	2.4.1
paramiko	pypi	0.1-bulbasaur, 0.1-charmander, 0.9-doduo, 0.9-eevee (+74 more)	1.17.6
paramiko	pypi	2.0.0, 2.0.1, 2.0.2, 2.0.3 (+4 more)	2.0.8
paramiko	pypi	2.2.0, 2.2.1, 2.2.2	2.2.3
paramiko	pypi	2.1.0, 2.1.1, 2.1.2, 2.1.3 (+1 more)	2.1.5

Vulnerability Classification

Common Weakness Enumeration (CWE) identifiers for this vulnerability type.

CWE-287
Improper AuthenticationMITRE

CVSS Score Breakdown

What the CVSS (Common Vulnerability Scoring System) 9.8 score means for each attack dimension.

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References

Frequently Asked Questions

What is CVE-2018-7750?: Paramiko not properly checking authentication before processing other requests This vulnerability has been assigned a severity rating of CRITICAL (CVSS score: 9.8/10).
How do I check if my project is affected by CVE-2018-7750?: CVE-2018-7750 affects paramiko. Use GeekWala's free vulnerability scanner to check your dependencies against CVE-2018-7750 and 200,000+ other known vulnerabilities.

Severity & Exploitability

CVSS Score

9.8

Exploitation is straightforward and causes maximum impact. Patch immediately.

Also Known As

GHSA-232r-66cg-79px

PYSEC-2018-19

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