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CVE-2026-7598— libssh2 userauth.c userauth_password integer overflow

CVSS 7.3 · High EPSS 0.07% · P21
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I. Basic Information for CVE-2026-7598

Vulnerability Information
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Vulnerability Title
libssh2 userauth.c userauth_password integer overflow
Source: NVD (National Vulnerability Database)
Vulnerability Description
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.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
Source: NVD (National Vulnerability Database)
Vulnerability Type
整数溢出或超界折返
Source: NVD (National Vulnerability Database)
Vulnerability Title
libssh2 数字错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
libssh2是The libssh2 project开源的一款实现SSH2协议的客户端C库，它能够执行远程命令、文件传输，同时为远程的程序提供安全的传输通道。 libssh2 1.11.1及之前版本存在数字错误漏洞，该漏洞源于src/userauth.c文件中userauth_password函数对参数username_len/password_len操作不当，可能导致整数溢出。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

VendorProductAffected VersionsCPESubscribe
-libssh2 1.11.0 cpe:2.3:a:libssh2:libssh2:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-7598

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III. Intelligence Information for CVE-2026-7598

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Same Patch Batch · n/a · 2026-05-01 · 53 CVEs total

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CVE-2026-75805.3 MEDIUMExiftool JPEG/QuickTime/MOV/MP4 GM.pm Process_mrld code injection
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Showing top 20 of 53 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: libssh2
Same vendor: n/a
Same weakness: CWE-190

V. Comments for CVE-2026-7598

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