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© 2026 FAUCET Technologies LLC. All rights reserved.

CVE-2026-7598

35
FAUCET Score

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.

First published: May 1, 2026Last modified: May 4, 2026

Impacted Technologies

VendorProductVersion(s)CPE
<= 1.11.1CPE matchmatch criteria
cpe:2.3:a:libssh2:libssh2:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 4.0

6.9MEDIUM

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
VS Confidentiality
LOW
VS Integrity
LOW
VS Availability
LOW
SS Confidentiality
NONE
SS Integrity
NONE
SS Availability
NONE
Exploit Maturity
NOT_DEFINED
CvssVersion
4.0

Exploit Intelligence

EPSS Score
0.47%
Probability of exploitation in next 30 days
EPSS Percentile
37.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0047 is in the 16th percentile among its peer group of 51,485 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (8)

github_advisorypatch availablevia nvd_reference
View patch
microsoftpatch availablevia msrc
Product: azl3 libssh2 1.11.1-2 on Azure Linux 3.0Fixed in: 1.11.1-2
microsoftpatch availablevia msrc
Product: azl3 libssh2 1.11.1-1 on Azure Linux 3.0Fixed in: 1.11.1-2
microsoftpatch availablevia msrc
Product: 21318-17084Fixed in: 1.11.1-2
microsoftpatch availablevia msrc
Product: 18213-17084Fixed in: 1.11.1-2
ubuntupatch availablevia ubuntu_usn
Product: libssh2 (questing)Fixed in: 1.11.1-1ubuntu0.25.10.1
ubuntupatch availablevia ubuntu_usn
Product: libssh2 (resolute)Fixed in: 1.11.1-1ubuntu0.26.04.1
ubuntupatch availablevia ubuntu_usn
Product: libssh2 (noble)Fixed in: 1.11.0-4.1ubuntu0.24.04.1

Vendor Advisories (2)

ubuntuUSN-8309-1

libssh2 vulnerability

May 26, 2026
microsoft2026-May/CVE-2026-7598Moderate

libssh2 userauth.c userauth_password integer overflow

May 2, 2026

References

access.redhat.com / errata/RHSA-2026:16736
access.redhat.com / errata/RHSA-2026:7021
access.redhat.com / security/cve/CVE-2026-7598
bugzilla.redhat.com / show_bug.cgi
security.access.redhat.com / data/csaf/v2/vex/2026/cve-2026-7598.json
github.com / libssh2/libssh2
Product
github.com / libssh2/libssh2/commit/256d04b60d80bf1190e96b0ad1e91b2174d744b1
Patch
github.com / libssh2/libssh2/pull/1858
Issue Tracking
vuldb.com / submit/805564
Third Party AdvisoryVDB Entry
vuldb.com / vuln/360555
Third Party AdvisoryVDB Entry
vuldb.com / vuln/360555/cti
Permissions RequiredVDB Entry