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CVE-2026-31798 Details

Description

JumpServer is an open source bastion host and an operation and maintenance security audit system. Prior to v4.10.16-lts, JumpServer improperly validates certificates in the Custom SMS API Client. When JumpServer sends MFA/OTP codes via Custom SMS API, an attacker can intercept the request and capture the verification code BEFORE it reaches the user's phone. This vulnerability is fixed in v4.10.16-lts.

Metrics

CVSS 3.x Severity and Vector Strings:

CNA: [email protected]CVSS-B:5 MEDIUMVector:CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:L

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://github.com/jumpserver/jumpserver/security/advisories/GHSA-26pj-mmxw-w3w7	[email protected]	Vendor Advisory

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-295	Improper Certificate Validation	[email protected]

Affected Products

Product	Versions
fit2cloud jumpserver	< 4.10.16
CPE cpe:2.3:a:fit2cloud:jumpserver:::::::: Remediation No remediation found in references.

Change History

4 change records found show changes

Date	Action	Recorded By
Jun 17, 2026	CVE Modified	[email protected]
Jun 17, 2026	CVE Modified	CISA-ADP
Mar 18, 2026	Initial Analysis	[email protected]
Mar 13, 2026	New CVE Received	[email protected]