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.
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Advisories
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Fixes
Solution
No solution given by the vendor.
Workaround
Disable GSSAPIKeyExchange.
References
History
Wed, 22 Jul 2026 20:00:00 +0000
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Wed, 22 Jul 2026 19:30:00 +0000
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ssvc
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Wed, 22 Jul 2026 00:15:00 +0000
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threat_severity
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threat_severity
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Tue, 21 Jul 2026 14:45:00 +0000
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| 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. | |
| Title | Libssh: libssh: authentication bypass via missing gssapi principal check | |
| First Time appeared |
Redhat
Redhat enterprise Linux Redhat hummingbird |
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| Weaknesses | CWE-863 | |
| CPEs | cpe:/a:redhat:hummingbird:1 cpe:/o:redhat:enterprise_linux:10 cpe:/o:redhat:enterprise_linux:8 cpe:/o:redhat:enterprise_linux:9 |
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| Vendors & Products |
Redhat
Redhat enterprise Linux Redhat hummingbird |
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| Metrics |
cvssV3_1
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Projects
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Status: PUBLISHED
Assigner: redhat
Published:
Updated: 2026-07-22T19:06:52.468Z
Reserved: 2026-07-07T15:40:24.561Z
Link: CVE-2026-59851
Updated: 2026-07-22T18:15:40.738Z
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OpenCVE Enrichment
No data.
Weaknesses