Vulnerability in Libssh
CVE-2026-59845
A flaw was found in libssh. When ProxyCommand is used, an unchecked fork() failure can be stored as process ID -1; during cleanup, signals may then be sent across the caller's accessible process tree, leading to local denial of service.
EPSS: 0.001 (1.1th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:C/C:N/I:N/A:H.
Affected products
- Libssh
- Red Hat Enterprise Linux 10 — versions 0:0.12.0-3.el10_2
- Red Hat Enterprise Linux 8
- Red Hat Enterprise Linux 9
- Red Hat Hardened Images — versions 0.12.1-4.hum1
- Redhat Enterprise_linux — versions 8.0, 9.0, 10.0
- Redhat Hardened_images
Weakness classification (CWE)
References
- secalert@redhat.com (x_refsource_REDHAT, vdb-entry, Vendor Advisory)
- secalert@redhat.com (x_refsource_REDHAT, issue-tracking, Issue Tracking, Vendor Advisory)
- secalert@redhat.com (x_refsource_REDHAT, vendor-advisory, Vendor Advisory)
- secalert@redhat.com (x_refsource_REDHAT, vendor-advisory)
- secalert@redhat.com (x_refsource_REDHAT, vendor-advisory)
- secalert@redhat.com (x_refsource_REDHAT, vendor-advisory)
Frequently asked questions
- What is CVE-2026-59845?
- CVE-2026-59845 is a medium-severity vulnerability in Libssh, classified under CWE-390. CVSS score: 5.3/10. Published 2026-07-21.
- How severe is CVE-2026-59845?
- Medium severity. CVSS v3 base score is 5.3 out of 10.