CVE-2026-106589: openbsd openssh Least Privilege Violation
Vulnerability summary
CVE-2026-106589 is a low (CVSS 2.9) Least Privilege Violation vulnerability in openbsd openssh. EPSS estimates a 0.08% chance of exploitation in the next 30 days, higher than 0.1% of scored vulnerabilities.
Not severe (CVSS 2.9, local access); no exploitation reported by the 5 checked sources
Source freshness unavailable
How is this decided?Timeline
- 06-10-2026PublishedVulnerability first disclosed.
- 07-10-2026Last modifiedVulnerability information updated.
Description
In sshd in OpenSSH through 10.6, in certain environments such as QNX 6 and SCO OpenServer 5, sshd-session can unexpectedly have root privileges. This is related to the GatewayPorts and StreamLocalForwarding configuration options, and lack of support for file-descriptor passing and unprivileged allocation of PTY devices.
CVSS metrics
4 scores · 4 sources · 1 version- OSV · UbuntuEcosystem advisory · calculated2.9LowCVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N
- OSV · DebianEcosystem advisory · calculated2.9LowCVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N
- NVDNIST2.9LowCVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N
EPSS trend
Probability
0.08%
Chance of exploitation in the next 30 days
Percentile
0%
Versus all other CVEs
30-day change
Change unavailable
Change unavailable
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Known conditions: local access, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.
Debian1 product
- opensshAll versions (No fix recorded)
Openbsd1 product
- openssh≤ 10.6
Ubuntu1 product
- openssh-ssh1All versions (No fix recorded)
3 vendors · 3 products
