CVE-2026-59851
CVE-2026-59851: 1 tracked advisory record across Red Hat. Compare source-reported impact, fixes and remediation.
Compare the source-linked records below. Ratings and product/version details belong to each advisory; they are not a single CVE-wide score or proof that every listed product is affected. How VulniPulse collects and checks evidence.
Vendor advisory comparison
Red Hat
1 advisory- Advisory severityHigh8.8
High [CVE-2026-59851] authentication bypass via missing GSSAPI principal check
CVE-2026-59851Source published Source updated
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. Red Hat severity: Important — CVSS 8.8 (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H). Weakness: CWE-863. Affected Red Hat products: Red Hat Enterprise Linux 10; Red Hat Hardened Images. Red Hat lists Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 9 as not affected. Red Hat fixing advisory: RHSA-2026:55855, RHSA-2026:42922. Affected products named by the advisory: Red Hat package: libssh.
- Affected products in this advisory
- Red Hat Enterprise Linux 10
- Red Hat Hardened Images
- Red Hat package: libssh
- Source-reported affected versions
- Affected-version details not available in this record.
- Source-reported fixed versions
- libssh-0:0.12.0-3.el10_2
- libssh-main-0.12.1-4.hum1
- RHSA-2026:55855
- RHSA-2026:42922
- Mitigation guidance
- Disable GSSAPIKeyExchange.
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