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CVE-2026-7598

libssh2 userauth.c userauth_password integer overflow

Published: May 1, 2026Updated: Jun 30, 2026 Sources: CVE List NVDCWE-189
7.3HIGH
NVD MITRE
EPSS Score
0.5%
Top 62.9%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available
Self-Check
OpenVAS

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.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:LI:LA:L
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:LConfidentiality
Low
I:LIntegrity
Low
A:LAvailability
Low
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Weaknesses

CWE-189CWE-190

Affected Products

libssh2
oss-project
libssh2Library
OSS Libraries / generic-library
and 1 more affected products View all →

Exploitability

Official Patch Available
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Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

1 technique
Initial Access
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References

https://vuldb.com/vuln/360555
vuldb.com
https://vuldb.com/vuln/360555/cti
vuldb.com
https://vuldb.com/submit/805564
vuldb.com
and 8 more references View all →

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