# CVE-2026-55565

## Summary

- **CVE ID:** CVE-2026-55565
- **Severity:** CRITICAL
- **CVSS Score:** 9.9 (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H)
- **CWE:** CWE-94
- **Published:** Aug 28, 2026
- **Last Modified:** Aug 31, 2026

## 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.

## Affected Products

- yamcs — yamcs (< 5.12.8)
- yamcs — yamcs (>= 5.13.0, < 5.13.2)

## References

- [CNA](https://github.com/yamcs/yamcs/security/advisories/GHSA-c64q-hj4j-375f)
- [CNA](https://github.com/yamcs/yamcs/commit/640e1598b7097b521692e89dd47a39b6cb1fc663)
- [CNA](https://github.com/yamcs/yamcs/commit/a8fb4a0693fa62a6eb729b26016d1090dd8b289c)
- [CNA](https://github.com/yamcs/yamcs/releases/tag/yamcs-5.12.8)
- [CNA](https://github.com/yamcs/yamcs/releases/tag/yamcs-5.13.2)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.46%
- **EPSS Percentile:** 38.8

---
_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-17._