CVE-2026-7598libssh2 userauth.c userauth_password integer overflow
Updated under an hour ago ()
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It affects n/a libssh2 and 5 other products. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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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
- 7.3 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:X/RL:O/RC:C
- Weakness (CWE)
- CWE-190, CWE-189
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- VulDB
- NVD analysis
- Modified
- Record last updated
- Sep 1, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
n/a libssh2 libssh2:libssh2 | 1.11.0; 1.11.1 | CNA record |
Red Hat Red Hat Hardened Images redhat:hummingbird | from 1.95.0-5.hum1 not affected | CISA ADP |
Red Hat Red Hat Enterprise Linux 6 redhat:enterprise_linux | 6 | CISA ADP |
Red Hat Red Hat OpenShift Container Platform 4 redhat:openshift | 4 | CISA ADP |
Red Hat Red Hat OpenShift Update Service redhat:openshift_update_service | 5 | CISA ADP |
Red Hat Red Hat Trusted Profile Analyzer redhat:trusted_profile_analyzer | 2 | CISA ADP |
libssh2 libssh2 libssh2:libssh2 | through 1.11.1 | NVD |
References
- https://vuldb.com/vuln/360555vdb-entry, technical-description, third-party-advisory
- https://vuldb.com/vuln/360555/ctisignature, permissions-required, vdb-entry
- https://vuldb.com/submit/805564third-party-advisory, vdb-entry
- https://github.com/libssh2/libssh2/pull/1858issue-tracking, patch
- https://github.com/libssh2/libssh2/commit/256d04b60d80bf1190e96b0ad1e91b2174d744b1patch
- https://github.com/libssh2/libssh2/product
- 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
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.