CVE•Published 2026-07-21•Modified 2026-08-17•1 article on news•4 live references•NVD data
CVE-2026-59851Libssh · Libssh
Vulnerability data via NVD (ingested)
CVSS v3.1
8.8
HIGH
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS percentile
20
Exploit Prediction Scoring System · top 80% of all CVEs
Weaknesses (CWE)
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.
Timeline
Published 2026-07-21
Modified 2026-08-17
External references
Search for exposed instances
Shodan + Censys queries derived from NVD's CPE data. The vuln tag catches assets Shodan has explicitly linked to this CVE; the product / banner fingerprints find exposed instances even when the vuln tag was never applied (which is common).
Shodan · vuln tag0 hosts
vuln:CVE-2026-59851Hosts Shodan has explicitly fingerprinted as vulnerable.
Shodan · product
product:"Libssh Libssh"All exposed Libssh Libssh instances — cross-reference with the CVE's affected-version range.
Shodan · banner/body mention
http.html:"Libssh"HTTP body or banner mentions "Libssh" — catches deploys Shodan didn't identify as a product.
More intel sources (5)
Shodan report
vuln:CVE-2026-59851Country / ASN / product breakdown for the vuln query.
Censys
vulnerabilities.cve_id: CVE-2026-59851Censys host search filtered to this CVE id.
grep.app
CVE-2026-59851Public source-code mentions — fast PoC discovery.
GitHub code
CVE-2026-59851GitHub code search for direct mentions.
Google dork
"CVE-2026-59851" exploit -site:nvd.nist.govWrite-ups and news, NVD excluded.