CVE-2026-44632

Description

Yamcs Vulnerable to Server-Side Code Injection (RCE) via Janino Expression Engine in `JavaExprAlgorithmExecutionFactory`

Description (MITRE) cveawg.mitre.org

Pulled from cveawg.mitre.org/api/cve/CVE-2026-44632 on 2026-07-30. Shown when MITRE's text differs from the cvelistV5 mirror.

Yamcs is a mission control framework. Prior to 5.12.7, a server-side code injection vulnerability existed in the Yamcs algorithm evaluation engine org.yamcs.algorithms.JavaExprAlgorithmExecutionFactory, which dynamically compiled and evaluated user-controlled algorithm text through the Janino compiler without enforcing a secure sandbox, so an authenticated user with the ChangeMissionDatabase privilege could override an existing algorithm's text via the mission database REST API and inject Java code (for example using 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.

Overview

State

—

Assigner (CNA)

—

CVSS severity

critical

CVSS score

9.1 / 10

CVSS vector

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

Effective score

9.1 / 10 CRITICAL source: CNA overview

CWE(s)

—

Reserved

—

Published

—

Last updated

—

Source

https://www.tenable.com/cve/CVE-2026-44632

Linked Threat

CVE-2026-44632 — CVE-2026-44632

NVD triage scoring NVD CVE 2.0

Layer NVD adds on top of the CNA's CVE record — published / last-modified timestamps, exploitability / impact subscores, and the FIRST.org EPSS probability that this CVE will be exploited in the wild in the next 30 days.

NVD published

2026-07-16 17:16:56 UTC

NVD last modified

2026-07-17 18:38:47 UTC

NVD CVSS v3.1

9.1 / 10 CRITICAL source: security-advisories@github.com

NVD CVSS vector

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

Exploitability subscore

2.3 / 10

Impact subscore

6.0 / 10

EPSS score

0.0117 (probability of exploitation in next 30 days)

EPSS percentile

64.27% vs all CVEs — higher = more likely to be exploited, as of 2026-07-30

NVD-assigned CWE(s): CWE-94 (differs from the CNA list above)

European Union Vulnerability Database ENISA EUVD

ENISA's official EU repository for curated vulnerability intelligence. Carries a separate identifier (EUVD-YYYY-NNNN) and frequently exposes an earlier-published description + CVSS than NVD does.

EUVD ID

EUVD-2026-44957

Assigner

GitHub_M

Published

Jul 16, 2026, 4:05:28 PM

Updated

Jul 16, 2026, 4:46:26 PM

EUVD base score (CVSS 3.1)

9.1 / 10
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

EUVD-reported EPSS

1.1700

Vendors

yamcs

Products

yamcs (< 5.12.7)

Aliases

GHSA-524g-x36v-9wm6

ENISA description: Yamcs is a mission control framework. Prior to 5.12.7, a server-side code injection vulnerability existed in the Yamcs algorithm evaluation engine org.yamcs.algorithms.JavaExprAlgorithmExecutionFactory, which dynamically compiled and evaluated user-controlled algorithm text through the Janino compiler without enforcing a secure sandbox, so an authenticated user with the ChangeMissionDatabase privilege could override an existing algorithm's text via the mission database REST API and inject Java code (for example using 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.

Vendor references (0)

References embedded in the original CVE record by the assigning CNA.

None in the CVE record.

MITRE references (5) cveawg.mitre.org

Pulled from MITRE's CVE Services API by the 🛰 Backfill from MITRE button.

• https://github.com/yamcs/yamcs/commit/3c550348f866af4675d2ba4a51d8d12b7c7c6011 x_refsource_MISC
• https://github.com/yamcs/yamcs/commit/4ff8fda642ea8c3309a4d3f379aa77b763148992 x_refsource_MISC
• https://github.com/yamcs/yamcs/releases/tag/yamcs-5.12.7 x_refsource_MISC
• https://github.com/yamcs/yamcs/releases/tag/yamcs-5.13.0 x_refsource_MISC
• https://github.com/yamcs/yamcs/security/advisories/GHSA-524g-x36v-9wm6 x_refsource_CONFIRM

Web references (2)

DuckDuckGo results ranked by threat-intel / vendor advisory domains. Generated by the 🔎 Find references (web) button above — same flow as the Remediations search.

• https://nvd.nist.gov/vuln/detail/CVE-2026-44632 tenable:nvd.nist.gov
• https://www.cve.org/CVERecord?id=CVE-2026-44632 tenable:www.cve.org

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