CVE-2026-59844 | A flaw was found in libssh. A remote authenticated client ca… | CVSS 6.5 MEDIUM

Description

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.

Metadata

CVE ID: CVE-2026-59844
State: PUBLISHED
Assigner: redhat
Reserved: 2026-07-07 15:40 UTC
Published: 2026-07-21 11:32 UTC
Last updated: 2026-07-21 16:17 UTC
Primary CWE: CWE-789
Memory Allocation with Excessive Size Value
Vendor / Product: Red Hat / Red Hat Enterprise Linux 10
Sources: cve.org · NVD

Severity & Metrics

6.5 MEDIUM CVSS 3.1

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

SSVC — CISA Coordinator

Exploitation: none
Automatable: no
Tech. Impact: partial

Affected products (5)

Vendor	Product	Platform	Versions
Red Hat	Red Hat Enterprise Linux 10	—	—
Red Hat	Red Hat Enterprise Linux 7	—	—
Red Hat	Red Hat Enterprise Linux 8	—	—
Red Hat	Red Hat Enterprise Linux 9	—	—
Red Hat	Red Hat Hardened Images	—	—

Weakness (CWE)

CWE	Source	Description
CWE-789	cna	Memory Allocation with Excessive Size Value

CVSS scores (1)

Score	Severity	Version	Source	Vector
6.5	MEDIUM	3.1	cna	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

References (2)