CVE-2026-59849
Fixed in a distro release EPSS <1%CVSS 3.1
A flaw was found in libssh. Logic errors in automatic certificate-based public key authentication can cause libssh clients to loop indefinitely when configured certificates are missing or repeatedly rejected by a server, leading to denial of service.
Products: Red Hat Enterprise Linux 10, Red Hat Hardened Images, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9
Distro releases
| Release | Package | Fixed in |
|---|---|---|
| AlmaLinux 10 | libssh | 0.12.0-3.el10_2 |
| AlmaLinux 10 | libssh-config | 0.12.0-3.el10_2 |
| AlmaLinux 10 | libssh-devel | 0.12.0-3.el10_2 |
| Chainguard | libssh | 0.12.1-r0 |
| Chainguard | libssh-dev | 0.12.1-r0 |
| Chainguard | libssh2 | 0 |
| Debian 13 | libssh | 0.11.5-0+deb13u1 |
| Debian 14 | libssh | 0.12.1-1 |
| Red Hat Enterprise Linux 10.2 | libssh | 0:0.12.0-3.el10_2 |
| Red Hat Enterprise Linux 10.2 | libssh-config | 0:0.12.0-3.el10_2 |
| Red Hat Enterprise Linux 10.2 | libssh-debuginfo | 0:0.12.0-3.el10_2 |
| Red Hat Enterprise Linux 10.2 | libssh-debugsource | 0:0.12.0-3.el10_2 |
| Red Hat Enterprise Linux 10.2 | libssh-devel | 0:0.12.0-3.el10_2 |
| Red Hat hummingbird 1 | libssh | 0:0.12.1-4.hum1 |
| Red Hat hummingbird 1 | libssh-config | 0:0.12.1-4.hum1 |
| Red Hat hummingbird 1 | libssh-devel | 0:0.12.1-4.hum1 |
| Rocky Linux 10 | libssh | 0:0.12.0-3.el10_2 |
| SUSE Linux Enterprise Server 16.0 | libssh | 0.11.5-160000.1.1 |
| SUSE Linux Enterprise Server for SAP applications 16.0 | libssh | 0.11.5-160000.1.1 |
| SUSE Linux Micro 6.2 | libssh | 0.11.5-160000.1.1 |
| Ubuntu 22.04 LTS | libssh | 0.9.6-2ubuntu0.22.04.8 |
| Ubuntu 24.04 LTS | libssh | 0.10.6-2ubuntu0.5 |
| Ubuntu 26.04 LTS | libssh | 0.11.3-1ubuntu2.1 |
| Wolfi | libssh | 0.12.1-r0 |
| Wolfi | libssh-dev | 0.12.1-r0 |
| Wolfi | libssh2 | 0 |
| openSUSE Leap 16.0 | libssh | 0.11.5-160000.1.1 |
| openSUSE Tumbleweed | libssh | 0.11.5-1.2 |