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TI-2026-40107 Aliases CVE-2026-55566GHSA-9272-wg2r-7xmx

Yamcs: DOM XSS in Extension Routing

Priority MEDIUM 53CWE-79Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Required
Attack complexity
Low
Impact type
Cross-site scripting
Confidentiality · integrity · availability
Low · None · None
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-79.

Summary

Yamcs is a mission control framework. Prior to 5.12.8 and 5.13.2, Yamcs processes attacker-controlled data from the /ext URL route in yamcs-web/src/main/webapp/projects/webapp/src/app/core/routes/extension.matcher.ts, extension.component.ts, and app.component.ts without checking registered plugin IDs before DOM rendering through innerHTML. A crafted URL can execute JavaScript when opened by a user. The script can read data available to the Yamcs web application and perform actions in the user context. This issue is fixed in versions 5.12.8 and 5.13.2.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.0038 32nd percentileScored 2026-11-07
Fix Fixed yamcs (yamcs): 5.12.8, 5.13.2org.yamcs:yamcs-core (Maven): 5.13.2, 5.12.8

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
yamcsyamcsbefore 5.12.8; 5.13.0 to before 5.13.25.12.8, 5.13.2Patch availableCNA
—org.yamcs:yamcs-core (Maven)5.13.0 to before 5.13.25.13.2Patch availableGHSA-9272-wg2r-7xmx
—org.yamcs:yamcs-core (Maven)before 5.12.85.12.8Patch availableGHSA-9272-wg2r-7xmx
  • yamcs Vendoryamcs Affected before 5.12.8; 5.13.0 to before 5.13.2 Fixed in 5.12.8, 5.13.2 Patch available CNA
  • org.yamcs:yamcs-core (Maven) Vendor— Affected 5.13.0 to before 5.13.2 Fixed in 5.13.2 Patch available GHSA-9272-wg2r-7xmx
  • org.yamcs:yamcs-core (Maven) Vendor— Affected before 5.12.8 Fixed in 5.12.8 Patch available GHSA-9272-wg2r-7xmx

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPEVersionsRoleVendor
cpe:2.3:a:spaceapplications:yamcs:*:*:*:*:*:*:*:*——yamcs
  • cpe:2.3:a:spaceapplications:yamcs:*:*:*:*:*:*:*:* Versions — — ·yamcs

Remediation

  • Fix · CNA yamcs (yamcs) Fixed in 5.12.8, 5.13.2
  • Fix · GHSA-9272-wg2r-7xmx org.yamcs:yamcs-core (Maven) Fixed in 5.13.2 Advisory →
  • Fix · GHSA-9272-wg2r-7xmx org.yamcs:yamcs-core (Maven) Fixed in 5.12.8 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-55566
  2. 2026-10-03 Alias added: GHSA-9272-wg2r-7xmx

References

Other 6

  • TI-2026-40103 Yamcs: Remote Code Execution via instance-template argument YAML injection (createInstance) CVSS 3.1CRITICAL 9.8
  • TI-2026-34240 Yamcs: Remote Code Execution via Mission Database algorithm override CVSS 3.1CRITICAL 9.8
  • TI-2026-32507 Yamcs: No Rate Limiting on Authentication Endpoint CVSS 3.1CRITICAL 9.8
  • TI-2026-40106 Yamcs: Authenticated remote code execution via unescaped StreamSQL `LIKE` pattern compiled by Janino (`LikeExpression`) CVSS 3.1CRITICAL 9.9
  • TI-2026-40057 Yamcs: Authenticated RCE via StreamSQL aggregate-compiler column-name injection in Yamcs `executeSql` CVSS 3.1CRITICAL 9.1
  • TI-2026-34277 Yamcs: Authenticated Remote Code Execution (RCE) via Jython Algorithm Code Injection CVSS 3.1CRITICAL 9.1
See all 23 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences