CVE-2026-7598

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.

CVSS v3 7.3 HIGH
CVSS v2.0 7.5 HIGH

7.3^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.4

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact LOW

Integrity Impact LOW

Availability Impact LOW

Scope UNCHANGED

7.5^/10

CVSS v2.0 : HIGH

Vector : AV:N/AC:L/Au:N/C:P/I:P/A:P

Exploitability : 10.0 / Impact : 6.4

Access Vector NETWORK

Access Complexity LOW

Authentication NONE

Confidentiality Impact PARTIAL

Integrity Impact PARTIAL

Availability Impact PARTIAL

References

Link	Resource
https://github.com/libssh2/libssh2/	Product
https://github.com/libssh2/libssh2/commit/256d04b60d80bf1190e96b0ad1e91b2174d744b1	Patch
https://github.com/libssh2/libssh2/pull/1858	Issue Tracking
https://vuldb.com/submit/805564	Third Party Advisory VDB Entry
https://vuldb.com/vuln/360555	Third Party Advisory VDB Entry
https://vuldb.com/vuln/360555/cti	Permissions Required VDB Entry
https://access.redhat.com/errata/RHSA-2026:16736
https://access.redhat.com/errata/RHSA-2026:61752
https://access.redhat.com/errata/RHSA-2026:7021
https://access.redhat.com/security/cve/CVE-2026-7598
https://bugzilla.redhat.com/show_bug.cgi?id=2464597
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-7598.json
https://vuldb.com/submit/805564	Third Party Advisory VDB Entry

Configurations

Configuration 1 (hide)

cpe:2.3:a:libssh2:libssh2:*:*:*:*:*:*:*:*

History

No history.

Information

Published : 2026-05-01 22:16

Updated : 2026-09-01 13:19

NVD link : CVE-2026-7598

Mitre link : CVE-2026-7598

CVE.ORG link : CVE-2026-7598

JSON object : View

Products Affected

libssh2

libssh2

CWE

CWE-189

Numeric Errors

CWE-190

Integer Overflow or Wraparound

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