Vulnerability · Published Jul 8, 2026 · Assigned by mitre
CVE-2026-59997
Medium 4.2
In plain English
A medium-severity security flaw in OpenSSH from OpenBSD. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 7% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)4.2Medium
Exploit odds (30 days)0.2%top 93.0% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
internal-sftp in sshd in OpenSSH before 10.4 recognizes only the first 9 command-line arguments, which can be important if a later command-line argument would have helped to ensure the intended security properties of an SFTP connection.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux:10 | openssh | 9.9p1-29.el10_2.alma.1 | ALSA-2026:85847 |
| AlmaLinux:8 | openssh | 8.0p1-34.el8_10 | ALSA-2026:88211 |
| AlmaLinux:9 | openssh | 9.9p1-13.el9_8.alma.1 | ALSA-2026:85958 |
| AlmaLinux:10 | openssh-askpass | 9.9p1-29.el10_2.alma.1 | ALSA-2026:85847 |
| AlmaLinux:8 | openssh-askpass | 8.0p1-34.el8_10 | ALSA-2026:88211 |
| AlmaLinux:9 | openssh-askpass | 9.9p1-13.el9_8.alma.1 | ALSA-2026:85958 |
| AlmaLinux:8 | openssh-cavs | 8.0p1-34.el8_10 | ALSA-2026:88211 |
| AlmaLinux:10 | openssh-clients | 9.9p1-29.el10_2.alma.1 | ALSA-2026:85847 |
| AlmaLinux:8 | openssh-clients | 8.0p1-34.el8_10 | ALSA-2026:88211 |
| AlmaLinux:9 | openssh-clients | 9.9p1-13.el9_8.alma.1 | ALSA-2026:85958 |
| AlmaLinux:10 | openssh-keycat | 9.9p1-29.el10_2.alma.1 | ALSA-2026:85847 |
| AlmaLinux:8 | openssh-keycat | 8.0p1-34.el8_10 | ALSA-2026:88211 |
| AlmaLinux:9 | openssh-keycat | 9.9p1-13.el9_8.alma.1 | ALSA-2026:85958 |
| AlmaLinux:10 | openssh-keysign | 9.9p1-29.el10_2.alma.1 | ALSA-2026:85847 |
| AlmaLinux:8 | openssh-ldap | 8.0p1-34.el8_10 | ALSA-2026:88211 |
| AlmaLinux:10 | openssh-server | 9.9p1-29.el10_2.alma.1 | ALSA-2026:85847 |
| AlmaLinux:8 | openssh-server | 8.0p1-34.el8_10 | ALSA-2026:88211 |
| AlmaLinux:9 | openssh-server | 9.9p1-13.el9_8.alma.1 | ALSA-2026:85958 |
| AlmaLinux:8 | pam_ssh_agent_auth | 0.10.3-8.34.el8_10 | ALSA-2026:88211 |
| AlmaLinux:9 | pam_ssh_agent_auth | 0.10.4-8.13.el9_8.alma.1 | ALSA-2026:85958 |
| Alpine:v3.24 | openssh | 10.3_p1-r1 | ALPINE-CVE-2026-59997 |
| Debian:12 | openssh | no fix listed | DEBIAN-CVE-2026-59997 |
| Debian:13 | openssh | no fix listed | DEBIAN-CVE-2026-59997 |
| Debian:14 | openssh | 1:10.4p1-1 | DEBIAN-CVE-2026-59997 |
| Rocky Linux:10 | openssh | 0:9.9p1-29.el10_2.rocky.0.1 | RLSA-2026:85847 |
| Rocky Linux:8 | openssh | 0:8.0p1-34.el8_10 | RLSA-2026:88211 |
| Rocky Linux:9 | openssh | 0:9.9p1-13.el9_8.rocky.0.1 | RLSA-2026:85958 |
| Ubuntu:22.04:LTS | openssh | 1:8.9p1-3ubuntu0.16 | UBUNTU-CVE-2026-59997 |
| Ubuntu:22.04:LTS | openssh | 1:8.9p1-3ubuntu0.16 | USN-8533-1 |
| Ubuntu:24.04:LTS | openssh | 1:9.6p1-3ubuntu13.18 | USN-8533-1 |
| Ubuntu:24.04:LTS | openssh | 1:9.6p1-3ubuntu13.18 | UBUNTU-CVE-2026-59997 |
| Ubuntu:25.10 | openssh | no fix listed | UBUNTU-CVE-2026-59997 |
| Ubuntu:26.04:LTS | openssh | 1:10.2p1-2ubuntu3.4 | UBUNTU-CVE-2026-59997 |
| Ubuntu:26.04:LTS | openssh | 1:10.2p1-2ubuntu3.4 | USN-8533-1 |
| Ubuntu:22.04:LTS | openssh-ssh1 | no fix listed | UBUNTU-CVE-2026-59997 |
| Ubuntu:24.04:LTS | openssh-ssh1 | no fix listed | UBUNTU-CVE-2026-59997 |
| Ubuntu:25.10 | openssh-ssh1 | no fix listed | UBUNTU-CVE-2026-59997 |
| Ubuntu:26.04:LTS | openssh-ssh1 | no fix listed | UBUNTU-CVE-2026-59997 |
| Ubuntu:26.10 | openssh-ssh1 | no fix listed | UBUNTU-CVE-2026-59997 |
Affected products (as reported)
Weakness: CWE-1284 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N