CVE-2026-59842A flaw was found in libssh.
Updated under an hour ago ()
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It affects libssh and 10 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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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
- 5.3 MEDIUM (v3.1, NVD)CVSS:3.1/AV:N/AC:L/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
- Not given
- NVD analysis
- Analyzed
- Record last updated
- Sep 22, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
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 |
redhat enterprise_linux_for_power_little_endian redhat:enterprise_linux_for_power_little_endian | 10.0; 10.2 | NVD |
redhat enterprise_linux_for_power_little_endian_els redhat:enterprise_linux_for_power_little_endian_els | 10.2 | NVD |
redhat enterprise_linux_for_power_little_endian_eus redhat:enterprise_linux_for_power_little_endian_eus | 10.2 | NVD |
References
- https://access.redhat.com/errata/RHSA-2026:42922issue-tracking
- https://access.redhat.com/errata/RHSA-2026:55855vendor-advisory
- https://access.redhat.com/security/cve/CVE-2026-59842vendor-advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2498168issue-tracking, 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.