Low 3.7Published Jul 21, 2026

CVE-2026-59842Libssh: libssh: information disclosure via short gssapi curve25519 public key

Updated under an hour ago (Oct 27, 2026, 8:10 AM ET)

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It affects Red Hat Enterprise Linux 10 and 11 other products. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for Red Hat Enterprise Linux 10

Exploited in the last 30 days

A flaw was found in libssh. During server-side GSSAPI key exchange, a client-supplied Curve25519 public key shorter than the expected length is copied without proper length validation, leading to an out-of-bounds heap read. This could allow a remote unauthenticated attacker to disclose small amounts of server memory.

CVSS: 3.7 LOW (v3.1, CNA)CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N
Weakness (CWE): CWE-125
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: redhat
NVD analysis: Analyzed
Record last updated: Aug 19, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Red Hat Red Hat Enterprise Linux 10 redhat:enterprise_linux	from 0:0.12.0-3.el10_2 not affected	CNA record
Red Hat Red Hat Hardened Images redhat:hummingbird	from 0.12.1-4.hum1 not affected	CNA record
libssh libssh libssh:libssh	0.12.0	NVD
redhat hardened_images redhat:hardened_images	all versions	NVD
redhat enterprise_linux redhat:enterprise_linux	10.0; 10.0; 10.0; 10.2; 10.2	NVD
redhat enterprise_linux_for_els redhat:enterprise_linux_for_els	10.2; 10.2	NVD
redhat enterprise_linux_for_eus redhat:enterprise_linux_for_eus	10.2; 10.2	NVD
redhat enterprise_linux_for_ibm_z_systems redhat:enterprise_linux_for_ibm_z_systems	10.0; 10.2	NVD
redhat enterprise_linux_for_ibm_z_systems_els redhat:enterprise_linux_for_ibm_z_systems_els	10.2	NVD
redhat enterprise_linux_for_ibm_z_systems_eus redhat:enterprise_linux_for_ibm_z_systems_eus	10.2	NVD
1–10 of 13

References

References

https://access.redhat.com/errata/RHSA-2026:42922	vendor-advisory, x-refsource-redhat, issue-tracking
https://access.redhat.com/errata/RHSA-2026:55855	vendor-advisory, x-refsource-redhat
https://access.redhat.com/security/cve/CVE-2026-59842	vdb-entry, x-refsource-redhat, vendor-advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2498168	issue-tracking, x-refsource-redhat, vendor-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.