Is CVE-2026-44423 in the CISA KEV catalog?

No. CVE-2026-44423 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2026-44423?

CVE-2026-44423 has a CVSS v3 base score of 6.5 (MEDIUM).

What is the EPSS score for CVE-2026-44423?

CVE-2026-44423 has an EPSS score of 0.25% (16th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2026-44423?

Upgrade shellhub to 0.24.2 or later.

CVE & CISA-KEV Catalog

CVE-2026-44423

MEDIUM

6.5

CVSS v3

NVD

Description

ShellHub is a centralized SSH gateway. Prior to 0.24.2, GET /api/sessions/:uid returns the full session object for any authenticated caller, without scoping by the caller's tenant. An authenticated user can read session records (SSH username, device UID, remote IP, terminal type, authenticated flag, timestamps) belonging to any other namespace. This vulnerability is fixed in 0.24.2.

CWE-639Authorization Bypass Through User-Controlled Key

How to fix

Remediation Available

shellhubNVD

Affected:< 0.24.2Fixed in:0.24.2CVE-2026-44423derived from NVD

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredLow

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityNone

AvailabilityNone

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Exploit Intelligence

0.25%probability of exploitation in 30 days

16thpercentile

Low risk: more likely to be exploited than 16% of all known CVEs.

References

Exploit1

github.com

Related Vulnerabilities

Other CWE-639 (Authorization Bypass Through User-Controlled Key) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2023-6875	Critical	9.8	90%	-	-
CVE-2024-46982	High	7.5	61%	-	Fix
CVE-2021-45428	Critical	9.8	57%	-	-
CVE-2019-17382	Critical	9.1	54%	-	Fix
CVE-2019-13360	Critical	9.8	24%	-	-
CVE-2023-48783	Medium	5.4	22%	-	Fix

Embed a live status badge for CVE-2026-44423

Markdown

[![CVE-2026-44423](https://tridentstack.com/cve/badge/CVE-2026-44423.svg)](https://tridentstack.com/cve/CVE-2026-44423)

HTML

<a href="https://tridentstack.com/cve/CVE-2026-44423"><img src="https://tridentstack.com/cve/badge/CVE-2026-44423.svg" alt="CVE-2026-44423"></a>

Find and fix vulnerabilities across your fleet

TridentStack Control continuously scans your Windows, macOS, and Linux fleet for known vulnerabilities, prioritizes them by severity and active exploitation, and patches them automatically.

Start free

This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-05-15.