Dashboard / CVE-2026-59843

CVE-2026-59843

MEDIUM
MEDIUM Priority: 0.04 BB Relevance: 63/100
Published: 2026-07-21 Modified: 2026-11-05 First seen: 2026-11-05 Status: active

Attack Surface

Network Low Complexity No Interaction

CVSS Vector Breakdown

AV: Network
AC: Low
PR: Low
UI: None
S: Unchanged
C: None
I: None
A: High

Description

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.

Weakness Classification (1)

References & Advisories (6)

https://access.redhat.com/errata/RHSA-2026:42922
vendor-advisory x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:55855
vendor-advisory x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:62217
vendor-advisory x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:62218
vendor-advisory x_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2498176
issue-tracking x_refsource_REDHAT

Bug Bounty Relevance

63 / 100
✓ Network accessible
✓ Low complexity
✓ No user interaction

CVSS Score

6.5 / 10.0 v3.1
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

EPSS — Exploitation Probability

0.57%
Raw Score 0.005670
Percentile 47.6%
Date 2026-11-14

EPSS Trend

2026-11-14
0.00567
2026-11-13
0.00567
2026-11-12
0.00567
2026-11-10
0.00567
2026-11-09
0.00567
2026-11-08
0.00567
2026-11-07
0.00567
2026-11-06
0.00567
2026-11-05
0.00567

Intelligence Sources

mitre ref →

External Links