A flaw was found in libssh. A remote authenticated client can issue SSH_FXP_READ requests with an arbitrarily large length, causing a libssh SFTP server to allocate excessive memory and potentially exhaust it through repeated requests.
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=2498177
https://access.redhat.com/security/cve/CVE-2026-59844
Source: Mitre, NVD
Published: 2026-07-21
Updated: 2026-09-01
Base Score: 6.8
Vector: CVSS2#AV:N/AC:L/Au:S/C:N/I:N/A:C
Severity: Medium
Base Score: 6.5
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
EPSS: 0.00461