CVE-2026-59848CWE-770denial-of-service

CVE-2026-59848

Medium · published July 21, 2026

CVSS v3.1
5.3
EPSS
0%
Percentile
26.3
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
5.3 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
CVSS v4.0
Not supplied
EPSS
0.00341 · 26.3th percentile
Weakness
CWE-770 · Allocation of Resources Without Limits or Throttling
Published
2026-07-21T18:16Z
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-2026-59848 · [email protected]https://bugzilla.redhat.com/show_bug.cgi?id=2498181 · [email protected]
EPSS history
Timeline
  • 21 JUL 13:21Z
    Libssh: libssh: denial of service via sftp responses with unknown request ids
    cvelistv5