CVE-2026-59851
HIGH
MEDIUM
Priority: 0.04
BB Relevance:
68/100
Published: 2026-07-21
Modified: 2026-11-05
First seen: 2026-11-04
Status: active
Attack Surface
Network
Low Complexity
No Interaction
Conf. Impact
Integ. Impact
CVSS Vector Breakdown
AV:
Network
AC:
Low
PR:
Low
UI:
None
S:
Unchanged
C:
High
I:
High
A:
High
Description
A flaw was found in libssh. On servers with GSSAPIKeyExchange enabled, the gssapi-keyex path does not verify whether the authenticated Kerberos principal is authorized for the requested local user, allowing authenticated clients to log in as arbitrary users.
Weakness Classification (1)
Affected Software (20)
| Vendor | Product | Version |
|---|---|---|
| libssh | libssh | - |
| libssh | libssh | 0.12.0 |
| redhat | enterprise_linux | 10.0 |
| redhat | enterprise_linux | 10.0 |
| redhat | enterprise_linux | 10.0 |
| redhat | enterprise_linux | 10.2 |
| redhat | enterprise_linux | 10.2 |
| redhat | enterprise_linux_eus | 10.2 |
| redhat | enterprise_linux_eus | 10.2 |
| redhat | enterprise_linux_for_els | 10.2 |
| redhat | enterprise_linux_for_els | 10.2 |
| redhat | enterprise_linux_for_ibm_z_systems | 10.0_s390x |
| redhat | enterprise_linux_for_ibm_z_systems | 10.2 |
| redhat | enterprise_linux_for_ibm_z_systems_els | 10.2 |
| redhat | enterprise_linux_for_ibm_z_systems_eus | 10.2 |
| redhat | enterprise_linux_for_power_little_endian | 10.0_ppc64le |
| redhat | enterprise_linux_for_power_little_endian | 10.2 |
| redhat | enterprise_linux_for_power_little_endian_els | 10.2 |
| redhat | enterprise_linux_for_power_little_endian_eus | 10.2 |
| redhat | hardened_images | - |
References & Advisories (4)
Vendor Advisory
Issue Tracking
Vendor Advisory
Issue Tracking