medium5.0
CVE-2026-31798
JumpServer is an open source bastion host and an operation and maintenance security audit system.
Impact
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.
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Fit2cloud | Jumpserver | before 4.10.16 |