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.
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions |
|---|---|---|---|
| Red Hat | Red Hat Enterprise Linux 10 | affected | — |
| Red Hat | Red Hat Enterprise Linux 8 | affected | — |
| Red Hat | Red Hat Enterprise Linux 9 | affected | — |
| Red Hat | Red Hat Hardened Images | affected | — |
No data.
No data.
No data.
Project Subscriptions
Advisories
No advisories yet.
Fixes
Solution
No solution given by the vendor.
Workaround
Do not connect to untrusted SFTP servers.
References
History
Tue, 21 Jul 2026 14:00:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | 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. | |
| Title | Libssh: libssh: denial of service via sftp responses with unknown request ids | |
| First Time appeared |
Redhat
Redhat enterprise Linux Redhat hummingbird |
|
| CPEs | cpe:/a:redhat:hummingbird:1 cpe:/o:redhat:enterprise_linux:10 cpe:/o:redhat:enterprise_linux:8 cpe:/o:redhat:enterprise_linux:9 |
|
| Vendors & Products |
Redhat
Redhat enterprise Linux Redhat hummingbird |
|
| References |
| |
| Metrics |
cvssV3_1
|
Projects
Sign in to view the affected projects.
MITRE
Status: PUBLISHED
Assigner: redhat
Published:
Updated: 2026-07-21T13:21:50.027Z
Reserved: 2026-07-07T15:40:24.561Z
Link: CVE-2026-59848
Vulnrichment
No data.
NVD
No data.
Redhat
No data.
OpenCVE Enrichment
No data.
Weaknesses
No weakness.