A flaw was found in libssh. A malicious SFTP server can send responses for unknown request IDs that libssh clients keep queued indefinitely, causing unbounded memory growth and client-side denial of service.
https://access.redhat.com/errata/RHSA-2026:62218
https://access.redhat.com/errata/RHSA-2026:62217
https://access.redhat.com/errata/RHSA-2026:55855
https://access.redhat.com/errata/RHSA-2026:42922
https://bugzilla.redhat.com/show_bug.cgi?id=2498181
https://access.redhat.com/security/cve/CVE-2026-59848
Source: Mitre, NVD
Published: 2026-07-21
Updated: 2026-09-01
Base Score: 5
Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:P
Severity: Medium
Base Score: 5.3
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
EPSS: 0.00285