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 products
libssh2: libssh2
References10
- github.com/libssh2/libssh2/commit/256d04b60d80bf1190e96b0ad1e91… Patch
- github.com/libssh2/libssh2/ Product
- 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
- access.redhat.com/errata/RHSA-2026:16736
- access.redhat.com/errata/RHSA-2026:61752
- access.redhat.com/errata/RHSA-2026:7021
- access.redhat.com/security/cve/CVE-2026-7598
Metrics
- CVSS 3.1
-
7.3
HIGH
Score source: CNA
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L - CVSS 4.0
-
6.9
MEDIUM
Score source: CNA
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 - EPSS — exploit probability
- 0% percentile: 42 · as of 13 November 2026
- CWE
- CWE-189CWE-190
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.