CVE-2026-59842
Last modified
CVE-2026-59842 is a medium-severity vulnerability rated 5.3/10 on the CVSS scale. 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. EPSS estimates a 0.42% chance of exploitation in the next 30 days.
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.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Libssh | Libssh | All versions |
| Redhat | Hardened Images | All versions |
| Redhat | Enterprise Linux | 10.0 |
References
- https://access.redhat.com/errata/RHSA-2026:42922Vendor Advisory
- https://access.redhat.com/security/cve/CVE-2026-59842Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2498168Issue Tracking, Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Analyzed
Frequently Asked Questions
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How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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