CVE-2026-59846
Low
No strong exploitation signal.
CVSS base
3.9
LOW
CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N
EPSS — probability of exploitation (30 days)
0.1%
2.1th percentile
CISA KEV
Not listed
Weakness / dates
CWE-77
Published 2026-07-21 · modified 2026-09-01
CVSS breakdown
CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N
| Attack Vector | L | Local |
| Attack Complexity | L | Low |
| Privileges Required | L | Low |
| User Interaction | R | Required |
| Scope | U | Unchanged |
| Confidentiality | L | Low |
| Integrity | L | Low |
| Availability | N | None |
Timeline
- 2026-07-21 — Published (NVD)
- 2026-09-01 — Last modified (NVD)
Description
A flaw was found in libssh. A malicious username expanded through %r in ProxyCommand handling can inject shell metacharacters, exposing environment variables and causing unintended shell behavior.
Affected
References
- https://access.redhat.com/errata/RHSA-2026:42922
- https://access.redhat.com/errata/RHSA-2026:55855
- https://access.redhat.com/errata/RHSA-2026:62217
- https://access.redhat.com/errata/RHSA-2026:62218
- https://access.redhat.com/security/cve/CVE-2026-59846
- https://bugzilla.redhat.com/show_bug.cgi?id=2498179