CVE-2026-59845
Low
No strong exploitation signal.
CVSS base
5.3
MEDIUM
CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:C/C:N/I:N/A:H
EPSS — probability of exploitation (30 days)
0.1%
1.1th percentile
CISA KEV
Not listed
Weakness / dates
CWE-390
Published 2026-07-21 · modified 2026-09-01
CVSS breakdown
CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:C/C:N/I:N/A:H
| Attack Vector | L | Local |
| Attack Complexity | H | High |
| Privileges Required | L | Low |
| User Interaction | R | Required |
| Scope | C | Changed |
| Confidentiality | N | None |
| Integrity | N | None |
| Availability | H | High |
Timeline
- 2026-07-21 — Published (NVD)
- 2026-09-01 — Last modified (NVD)
Description
A flaw was found in libssh. When ProxyCommand is used, an unchecked fork() failure can be stored as process ID -1; during cleanup, signals may then be sent across the caller's accessible process tree, leading to local denial of service.
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-2026-59845
- https://bugzilla.redhat.com/show_bug.cgi?id=2498178