CVE-2026-31798CWE-295

JumpServer Improper Certificate Validation in Custom SMS API Client

Medium · published March 13, 2026

CVSS v3.1
5.0
EPSS
0%
Percentile
2.3
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
5.0 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:L
CVSS v4.0
Not supplied
EPSS
0.00129 · 2.3th percentile
Weakness
CWE-295 · Improper Certificate Validation
Published
2026-03-13T19:15Z
EPSS history
Timeline
  • 13 MAR 19:15Z
    JumpServer Improper Certificate Validation in Custom SMS API Client
    cvelistv5