CVE-2026-59842 — LOW (3.7) — White Hats Nepal

Vulnerability Description

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 Score

3.7

LOW

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

LOW

Integrity

NONE

Availability

NONE

Affected Products

Vendor	Product	Versions
Libssh	Libssh	-
Redhat	Hardened Images	-
Redhat	Enterprise Linux	10.0

Related Weaknesses (CWE)

CWE-125

References

https://access.redhat.com/errata/RHSA-2026:42922Vendor Advisory
https://access.redhat.com/errata/RHSA-2026:55855
https://access.redhat.com/security/cve/CVE-2026-59842Vendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2498168Issue TrackingVendor Advisory

FAQ

What is CVE-2026-59842?

CVE-2026-59842 is a vulnerability with a CVSS score of 3.7 (LOW). 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 o...

How severe is CVE-2026-59842?

CVE-2026-59842 has been rated LOW with a CVSS base score of 3.7/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-59842?

Check the references section above for vendor advisories and patch information. Affected products include: Libssh Libssh, Redhat Hardened Images, Redhat Enterprise Linux.