CVE-2026-31798

Name: CVE-2026-31798
Creator: NVD / NIST
Published: 2026-03-13T19:54:36.097+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5/10EPSS 0.10%

Last modified Jun 17, 2026

CVE-2026-31798 is a medium-severity vulnerability rated 5/10 on the CVSS scale. 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. EPSS estimates a 0.10% chance of exploitation in the next 30 days.

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 3.1

5/10

CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:L

EPSS Probability

0.10%

0.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-295

Affected Software

Vendor	Product	Versions
Fit2cloud	Jumpserver	< 4.10.16

References

https://github.com/jumpserver/jumpserver/security/advisories/GHSA-26pj-mmxw-w3w7Vendor Advisory

Timeline

Published: Mar 13, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2026-31798?

How severe is CVE-2026-31798?

CVE-2026-31798 has a CVSS score of 5/10 (MEDIUM severity). The EPSS model estimates a 0.10% probability of exploitation in the next 30 days.

How do I fix CVE-2026-31798?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-31798?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST