CVE-2026-7598

What it is

A security vulnerability has been detected in libssh2 up to 1.11.1. The impacted element is the function userauth_password of the file src/userauth.c. Such manipulation of the argument username_len/password_len leads to integer overflow. The attack may be launched remotely. The name of the patch is 256d04b60d80bf1190e96b0ad1e91b2174d744b1. A patch should be applied to remediate this issue.

At a glance

Exploitability

Can be exploited over the network without logging in. Limited direct impact.

Exploit odds

0.5% chance of exploitation in the next 30 days (EPSS).

Fix

A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

1. 2026-05-01 22:16 UTC PublishedDisclosed publicly on CVE.org and NVD
2. 2026-09-01 13:19 UTC Last updatedMost recent change to the record

Details

Published

2026-05-01 22:16 UTC

Last modified

2026-09-01 13:19 UTC

Exploit probability

0.5% · EPSS, next 30 days

Weakness

CWE-189

Record status

Modified

Affected

• libssh2 ≤ 1.11.1

Attack profile CVSS 4.0 · 6.9

Attack vector

Network

Complexity

Low

Attack requirements

None

Privileges needed

None

User interaction

None

Confidentiality

Low

Integrity

Low

Availability

Low