CVE-2026-59844CWE-789

CVE-2026-59844

Medium · published July 21, 2026

CVSS v3.1
6.5
EPSS
1%
Percentile
46.3
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
6.5 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CVSS v4.0
Not supplied
EPSS
0.00567 · 46.3th percentile
Weakness
CWE-789 · Memory Allocation with Excessive Size Value
Published
2026-07-21T16:18Z
Affected products (5)
ProductVersionsFixed in
libssh/libsshall versions—
redhat/hardened_imagesall versions—
redhat/enterprise_linuxall versions—
redhat/enterprise_linuxall versions—
redhat/enterprise_linuxall versions—
References (6)
https://access.redhat.com/errata/RHSA-2026:42922 · [email protected]https://access.redhat.com/errata/RHSA-2026:55855 · [email protected]https://access.redhat.com/errata/RHSA-2026:62217 · [email protected]https://access.redhat.com/errata/RHSA-2026:62218 · [email protected]https://access.redhat.com/security/cve/CVE-2026-59844 · [email protected]https://bugzilla.redhat.com/show_bug.cgi?id=2498177 · [email protected]
EPSS history
Timeline
  • 21 JUL 11:32Z
    Libssh: libssh: denial of service via oversized sftp read length
    cvelistv5