Search/CVE-2026-59843
● CVE — Medium

CVE-2026-59843

Vendorredhat, libsshProductenterprise linux, hardened images, libsshDiscoveredJul 21, 2026UpdatedSep 1, 2026

A flaw was found in libssh. A remote authenticated peer can advertise a zero maximum packet size in SSH_MSG_CHANNEL_OPEN, causing later channel writes to loop indefinitely and consume CPU, leading to denial of service.

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CVSS v3.1
6.5 MEDIUM
EPSS
0.57%
probability of exploitation in 30 days
CISA KEV
Not listed
no confirmed exploitation reported
News coverage
1
sources referencing this CVE
Related IOCs
0
seen in the same coverage
Intelligence Reports1
1 intelligence report available

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EPSS Trend
Aug 19, 2026 → Oct 29, 2026
▲ 0.04pp
0.53% → 0.57% over 4 tracked changes
CVSS v3.1 Detail
Attack VectorNETWORK
Attack ComplexityLOW
Privileges RequiredLOW
User InteractionNONE
ScopeUNCHANGED
ConfidentialityNONE
IntegrityNONE
AvailabilityHIGH
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Connections
6 relationships
Timeline
disclosure → media coverage
Jul 21, 2026
Disclosure — published as a CVE record. · last revised by NVD Sep 1, 2026
Aug 31, 2026
ubuntu.com reports: USN-8699-1: libssh vulnerabilities