SEPTEMBER 15, 2026
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Case File

CVE-2026-55565

CRITICAL · CVSS 9.9 EPSS 0.46% Public Exploit

Source: NVD + CISA KEV + EPSS · Published 2026-08-28 · Last synced 2026-09-15

CyberRota Analysis

AI-Generated

The vulnerability affects the Yamcs mission control framework, specifically in the handling of unescaped LIKE patterns in Java source code, which can lead to Java code injection. This flaw allows an attacker to execute arbitrary Java code on the Yamcs server, posing a critical risk to system integrity and confidentiality. Organizations using affected versions prior to 5.12.8 and 5.13.2 should prioritize patching to mitigate this severe security threat.

Public Exploit Signal

A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.

Note: these links are listed for security research and verification purposes only.

CVE
CVE-2026-55565
Severity
CRITICAL
CVSS
9.9
EPSS
0.46%
Java

Original NVD Description

Yamcs is a mission control framework. Prior to 5.12.8 and 5.13.2, Yamcs LikeExpression.fillCode_getValueReturn in yamcs-core/src/main/java/org/yamcs/yarch/streamsql/LikeExpression.java inserts an unescaped LIKE pattern into Java source compiled by Expression.getCompiledExpression through SimpleCompiler.cook instead of applying ValueExpression.escapeJavaString. The pattern can originate from POST /api/archive/{instance}:executeSql, POST /api/archive/{instance}:streamSql, POST /api/archive/{instance}/tables/{table}:readRows, GET /api/archive/{instance}/events, or activity searches, including paths available with ReadTables, ReadEvents, or ReadActivities. A quote in the pattern can inject Java that runs as the Yamcs server process. This issue is fixed in versions 5.12.8 and 5.13.2.