← Vulnerability feed

Vulnerability record · CVE-2026-46621 · published 16 July 2026

CVE-2026-46621: Spaceapplications yamcs code injection vulnerability

Spaceapplications · Yamcs

Yamcs is a mission control framework. Prior to 5.12.7, the Yamcs script evaluation engine for Python algorithms dynamically compiled and evaluated user-controlled algorithm text using Jython through the JSR-223 ScriptEngine API without enforcing a secure sandbox, so an authenticated user with the ChangeMissionDatabase privilege could override an existing Python algorithm's logic through the mission database REST API and import and execute arbitrary Java classes such as java.lang.Runtime to achieve remote code execution on the underlying host operating system. This issue is fixed in versions 5.12.7 and 5.13.0, which disable algorithm editing by default.

9.1 CVSS 3.1 Critical EPSS 1.1% · top 35.3% CWE-94 · Code injection
9.1CVSS 3.1 base score
1.1%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
6References, 2 tagged exploit
20 Jul 2026Last modified by NVD

Description

Yamcs is a mission control framework. Prior to 5.12.7, the Yamcs script evaluation engine for Python algorithms dynamically compiled and evaluated user-controlled algorithm text using Jython through the JSR-223 ScriptEngine API without enforcing a secure sandbox, so an authenticated user with the ChangeMissionDatabase privilege could override an existing Python algorithm's logic through the mission database REST API and import and execute arbitrary Java classes such as java.lang.Runtime to achieve remote code execution on the underlying host operating system. This issue is fixed in versions 5.12.7 and 5.13.0, which disable algorithm editing by default.

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/yamcs/yamcs/commit/3c550348f866af4675d2ba4a51d8d12b7c7c6011 Patch
https://github.com/yamcs/yamcs/commit/4ff8fda642ea8c3309a4d3f379aa77b763148992 Patch
https://github.com/yamcs/yamcs/releases/tag/yamcs-5.12.7 Release Notes
https://github.com/yamcs/yamcs/releases/tag/yamcs-5.13.0 Release Notes
https://github.com/yamcs/yamcs/security/advisories/GHSA-2g95-6x5q-xjwj ExploitVendor Advisory
https://github.com/yamcs/yamcs/security/advisories/GHSA-2g95-6x5q-xjwj ExploitVendor Advisory

Track CVE-2026-46621 inside VULONE

Watch it alongside the ransomware crews, C2 infrastructure and forum chatter that reference it, query it through the API and pull it into your SIEM over TAXII.

Start free Open in platform

Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2026-46562Spaceapplications yamcs code injection vulnerabilityYamcs is a mission control framework. Prior to 5.12.7, the Nashorn ScriptEngine used to evaluate user-supplied JavaScript algorithm text in yamcs-cor…EPSS 0.98%9.8CVE-2026-44596Spaceapplications yamcs improper restriction of authentication attempts vulnerabilityYamcs is a mission control framework. Prior to 5.12.7, the authentication endpoint POST /auth/token in yamcs-core, handled by yamcs-core/src/main/jav…EPSS 2.1%9.1CVE-2026-44632Spaceapplications yamcs code injection vulnerabilityYamcs is a mission control framework. Prior to 5.12.7, a server-side code injection vulnerability existed in the Yamcs algorithm evaluation engine or…EPSS 1.1%9.1CVE-2023-45278Spaceapplications yamcs path traversal vulnerabilityDirectory Traversal vulnerability in the storage functionality of the API in Yamcs 5.8.6 allows attackers to delete arbitrary files via crafted HTTP …EPSS 1.6%7.5CVE-2023-45277Spaceapplications yamcs path traversal vulnerabilityYamcs 5.8.6 is vulnerable to directory traversal (issue 1 of 2). The vulnerability is in the storage functionality of the API and allows one to escap…EPSS 1.0%6.1CVE-2023-45281Spaceapplications yamcs cross-site scripting vulnerabilityAn issue in Yamcs 5.8.6 allows attackers to obtain the session cookie via upload of crafted HTML file.EPSS 0.41%5.4CVE-2023-45279Spaceapplications yamcs cross-site scripting vulnerabilityYamcs 5.8.6 allows XSS (issue 1 of 2). It comes with a Bucket as its primary storage mechanism. Buckets allow for the upload of any file. There's a w…EPSS 0.43%5.4CVE-2023-45280Spaceapplications yamcs cross-site scripting vulnerabilityYamcs 5.8.6 allows XSS (issue 2 of 2). It comes with a Bucket as its primary storage mechanism. Buckets allow for the upload of any file. There's a w…EPSS 0.53%

Source: NIST National Vulnerability Database (record CVE-2026-46621), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.