CVE-2026-44632 — Security Box Score

CVE · referencelatest edition

Reference page — cumulative record through Wednesday, August 19, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2026-44632CRITICAL

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

  AV  AC  PR  UI  S  C  I  A   CVSS    EPSS   %ile   KEV
   N   L   H   N  C  H  H  H    9.1   .0117   64.9     —

AFFECTED
  Product  Versions    Fixed
  yamcs    < 5.12.7 –  —

TIMELINE
  May 7   Reserved by GitHub_M
  Jul 16  EXPLOIT PUBLISHED — CVE-2026-44632 (yamcs). Public exploit reference added.
  Jul 16  Published (CNA: GitHub_M)

CWE-94 · CNA: GitHub_M · CVSS v3.1 · 5 references · NVD status: Analyzed

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.

Lifecycle

Complete event history — 3 events, chronological
Date	Event	Detail
May 7, 2026	Reserved	Reserved by GitHub_M
July 16, 2026	EXPLOIT PUBLISHED	EXPLOIT PUBLISHED — CVE-2026-44632 (yamcs). Public exploit reference added.
July 16, 2026	Published	Published (CNA: GitHub_M)

Affected

Affected products and packages — 1 row
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
yamcs	yamcs	—	< 5.12.7	—

Weaknesses

CWE-94

References (5)

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-524g-x36v-9wm6 [Exploit, Vendor Advisory]

Authoritative record: CVE-2026-44632 at cve.org

Vendors: yamcs

Weaknesses: CWE-94

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-44632 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Wednesday, August 19, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.