CVE-2026-59849
Low
No strong exploitation signal.
CVSS base
3.1
LOW
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L
EPSS — probability of exploitation (30 days)
0.2%
16.0th percentile
CISA KEV
Not listed
Weakness / dates
CWE-835
Published 2026-07-21 · modified 2026-08-19
CVSS breakdown
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L
| Attack Vector | N | Network |
| Attack Complexity | H | High |
| Privileges Required | L | Low |
| User Interaction | N | None |
| Scope | U | Unchanged |
| Confidentiality | N | None |
| Integrity | N | None |
| Availability | L | Low |
Timeline
- 2026-07-21 — Published (NVD)
- 2026-08-19 — Last modified (NVD)
Description
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.