---
id: CVE-2026-55565
title: Yamcs is a mission control framework
summary: >-
  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 c…
severity: critical
cvss: 9.9
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H'
cwe:
  - CWE-94
vendor: yamcs
product: 'org.yamcs:yamcs-core'
affected:
  - 'org.yamcs:yamcs-core >= 5.13.0, <= 5.13.1'
  - 'org.yamcs:yamcs-core <= 5.12.7'
patched:
  - 'org.yamcs:yamcs-core 5.13.2'
  - 'org.yamcs:yamcs-core 5.12.8'
published: '2026-08-28'
updated: '2026-09-08'
sourceUpdated: '2026-09-08T21:08:37.320'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-55565'
references:
  - url: >-
      https://github.com/yamcs/yamcs/commit/640e1598b7097b521692e89dd47a39b6cb1fc663
    label: security-advisories@github.com
  - url: >-
      https://github.com/yamcs/yamcs/commit/a8fb4a0693fa62a6eb729b26016d1090dd8b289c
    label: security-advisories@github.com
  - url: 'https://github.com/yamcs/yamcs/releases/tag/yamcs-5.12.8'
    label: security-advisories@github.com
  - url: 'https://github.com/yamcs/yamcs/releases/tag/yamcs-5.13.2'
    label: security-advisories@github.com
  - url: 'https://github.com/yamcs/yamcs/security/advisories/GHSA-c64q-hj4j-375f'
    label: security-advisories@github.com
  - url: 'https://github.com/yamcs/yamcs/security/advisories/GHSA-c64q-hj4j-375f'
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
  - url: 'https://github.com/advisories/GHSA-c64q-hj4j-375f'
tags:
  - nvd
  - ghsa
  - maven
epss: 0.0065
epssPercentile: 0.48895
aliases:
  - GHSA-c64q-hj4j-375f
ecosystem: maven
ingestedAt: '2026-08-28T18:23:37.964Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

## Package advisory (CVE-2026-55565)

Affected packages:

- `org.yamcs:yamcs-core >= 5.13.0, <= 5.13.1`
- `org.yamcs:yamcs-core <= 5.12.7`

Patched in:

- `org.yamcs:yamcs-core 5.13.2`
- `org.yamcs:yamcs-core 5.12.8`

Source: https://github.com/advisories/GHSA-c64q-hj4j-375f