CVE-2026-31798
Medium
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.
SeverityMedium
CVSS5.0
Exploit probability—
ProductFit2cloud Jumpserver
PublishedMar 13, 2026
First seenMar 13, 2026
Weakness typeCWE-295CWE-295
How to fix
Update
- fit2cloud jumpserver4.10.16 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| fit2cloud jumpserver | v < 4.10.16 | 4.10.16 |
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