CVE detail
CVE-2026-59851
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.
Buzz score
Why this CVE is surfacing
This all-time snapshot uses the same composite formula as Trending across a 30-year evidence window, rather than a current rolling window.
Buzz score components · mention 13.9 · diversity 6.5 · KEV 0.0 · OTX 0.0 · PoC 0.0
Why it matters now
Mention timeline
- Total mentions
- 3
- within the 30d window
- Peak daily
- 3
- highest bucket
Evidence
Source links by recency
3 source links · newest first
- https://access.redhat.com/errata/RHSA-2026:42922access.redhat.com
No excerpt available.
Exploitaccess.redhat.comJul 21, 2026, 3:16 PM - https://bugzilla.redhat.com/show_bug.cgi?id=2498184bugzilla.redhat.com
No excerpt available.
Exploitbugzilla.redhat.comJul 21, 2026, 3:16 PM - https://access.redhat.com/security/cve/CVE-2026-59851access.redhat.com
No excerpt available.
Exploitaccess.redhat.comJul 21, 2026, 3:16 PM
Exploit code
Public exploit repository references
Public PoC repositories are third-party, potentially unsafe artifacts. Treat their code as untrusted and use it only on authorized systems in an isolated, least-privilege environment. cvebuzz does not execute the code or verify that an exploit works.
0 repository references · best confidence N/A · max 0 stars
Related records
Similar CVEs
6 related CVEs with shared weakness or product evidence
- CVE-2026-59850CVSS 4.3 · Medium
A flaw was found in libssh. If data packets are processed after a channel is closed, channel data callbacks can be invoked after the associated data has already been freed, leadin…
- CVE-2026-59849CVSS 3.1 · Low
A flaw was found in libssh. Logic errors in automatic certificate-based public key authentication can cause libssh clients to loop indefinitely when configured certificates are mi…
- CVE-2026-59848CVSS 5.3 · Medium
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 cl…
- CVE-2026-59847CVSS 5.9 · Medium
A flaw was found in libssh. Incorrect AES-GCM finalization checks in builds using the OpenSSL backend can effectively remove integrity protection, allowing an in-path attacker to…
- CVE-2026-59846CVSS 3.9 · Low
A flaw was found in libssh. A malicious username expanded through %r in ProxyCommand handling can inject shell metacharacters, exposing environment variables and causing unintende…
- CVE-2026-59845CVSS 5.3 · Medium
A flaw was found in libssh. When ProxyCommand is used, an unchecked fork() failure can be stored as process ID -1; during cleanup, signals may then be sent across the caller's acc…