CVE-2026-31798: JumpServer Improper Certificate Validation in Custom SMS API Client
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 Software
Event History
Frequently Asked Questions
What is the severity of CVE-2026-31798?
CVE-2026-31798 has a high severity rating due to improper certificate validation, which can lead to security vulnerabilities in the JumpServer application.
How do I fix CVE-2026-31798?
To fix CVE-2026-31798, upgrade JumpServer to version 4.10.16-lts or later, where the certificate validation issue is resolved.
What versions of JumpServer are affected by CVE-2026-31798?
JumpServer versions prior to 4.10.16-lts are affected by CVE-2026-31798 and are vulnerable to improper certificate validation.
What could an attacker achieve by exploiting CVE-2026-31798?
An attacker exploiting CVE-2026-31798 could bypass the MFA/OTP process, potentially gaining unauthorized access to the system.
What is the context of CVE-2026-31798 in JumpServer?
CVE-2026-31798 details an issue in JumpServer's Custom SMS API Client where certificates are not properly validated, affecting security during MFA/OTP code transmission.