CVE-2026-7598

libssh2 userauth.c userauth_password integer overflow

HIGH
7.3
CVSS Score
Published: May 1, 2026 at 09:30 PM UTC
Updated: September 1, 2026 at 03:31 PM UTC
3 products affected across 2 vendorsLIBSSH2Enterprise LinuxTrusted Profile Analyzer

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Severity
HIGH7.3
Exploit prediction
EPSS 0.5%
SSVC
PoC

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

References (12)

VDB EntryTechnical DescriptionThird Party Advisory
Source: cverecord
https://vuldb.com/vuln/360555
SignaturePermissions RequiredVDB Entry
Source: cverecord
https://vuldb.com/vuln/360555/cti
Third Party AdvisoryVDB Entry
Source: cverecord
https://vuldb.com/submit/805564
Issue TrackingPatch
Source: cverecord
https://github.com/libssh2/libssh2/pull/1858
Product
Source: cverecord
https://github.com/libssh2/libssh2/
Source: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
https://access.redhat.com/errata/RHSA-2026:16736
Source: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
https://access.redhat.com/errata/RHSA-2026:7021

SSVC — Action Prioritization

SSVCPoCAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.3HIGHVulDB
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-190CWE-189

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