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TI-2026-32507 Aliases CVE-2026-44596GHSA-w5r6-mcgq-7pq4

Yamcs: No Rate Limiting on Authentication Endpoint

Priority HIGH 81CWE-307Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Security bypass
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and GitHub. Impact type from CWE-307.

Summary

Yamcs is a mission control framework. Prior to 5.12.7, the authentication endpoint POST /auth/token in yamcs-core, handled by yamcs-core/src/main/java/org/yamcs/http/auth/AuthHandler.java, lacked any rate limiting, account lockout, or failed-attempt throttling, so an unauthenticated remote attacker could perform unlimited password-guessing attempts against any user account, significantly increasing the risk of successful brute-force attacks. This issue is fixed in versions 5.12.7 and 5.13.0.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.0206 81st percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed yamcs (yamcs): 5.12.7org.yamcs:yamcs-core (Maven): 5.12.7

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
Yes
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 5.12.75.12.7Patch availableCNA
—org.yamcs:yamcs-core (Maven)before 5.12.75.12.7Patch availableGHSA-w5r6-mcgq-7pq4
  • yamcs Vendoryamcs Affected before 5.12.7 Fixed in 5.12.7 Patch available CNA
  • org.yamcs:yamcs-core (Maven) Vendor— Affected before 5.12.7 Fixed in 5.12.7 Patch available GHSA-w5r6-mcgq-7pq4

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:spaceapplications:yamcs:*:*:*:*:*:*:*:*before 5.12.7Vulnerableyamcs
  • cpe:2.3:a:spaceapplications:yamcs:*:*:*:*:*:*:*:* Versions before 5.12.7 Vulnerable ·yamcs

Remediation

  • Fix · CNA yamcs (yamcs) Fixed in 5.12.7
  • Fix · GHSA-w5r6-mcgq-7pq4 org.yamcs:yamcs-core (Maven) Fixed in 5.12.7 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-44596
  2. 2026-10-03 Alias added: GHSA-w5r6-mcgq-7pq4

References

Exploit 1

Patch 2

Other 3

  • TI-2026-34240 Yamcs: Remote Code Execution via Mission Database algorithm override CVSS 3.1CRITICAL 9.8
  • TI-2026-34277 Yamcs: Authenticated Remote Code Execution (RCE) via Jython Algorithm Code Injection CVSS 3.1CRITICAL 9.1
  • TI-2026-32532 Yamcs: Server-Side Code Injection (RCE) via Janino Expression Engine in `JavaExprAlgorithmExecutionFactory` CVSS 3.1CRITICAL 9.1
  • TI-2026-40093 Yamcs: Insecure Direct Object Reference (IDOR) in PacketsApi allows unprivileged users to dump all telemetry packets CVSS 3.1MEDIUM 4.3
  • TI-2026-32506 Yamcs: Unauthorized user enumeration via IAM API endpoints CVSS 3.1MEDIUM 4.3
  • TI-2023-24268 Directory Traversal vulnerability in the storage functionality of the API in Yamcs 5.8.6… CVSS 3.1CRITICAL 9.1
See all 10 →

Sources

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