Yamcs: No Rate Limiting on Authentication Endpoint

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-44596
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-07-16 17:16:55 UTC
Updated2026-07-17 18:44:26 UTC
DescriptionYamcs 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.

Risk And Classification

Primary CVSS: v3.1 9.8 CRITICAL from [email protected]

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS: 0.017700000 probability, percentile 0.756900000 (date 2026-07-20)

Problem Types: CWE-307 | CWE-307 CWE-307: Improper Restriction of Excessive Authentication Attempts

VersionSourceTypeScoreSeverityVector
3.1[email protected]Primary9.8CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
3.1[email protected]Secondary6.5MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
3.1CNADECLARED6.5MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Spaceapplications Yamcs All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Yamcs Yamcs affected < 5.12.7 Not specified

References

ReferenceSourceLinkTags
github.com/yamcs/yamcs/security/advisories/GHSA-w5r6-mcgq-7pq4 134c704f-9b21-4f2e-91b3-4a467353bcc0 github.com Exploit, Vendor Advisory
github.com/yamcs/yamcs/releases/tag/yamcs-5.13.0 [email protected] github.com Release Notes
github.com/yamcs/yamcs/releases/tag/yamcs-5.12.7 [email protected] github.com Release Notes
github.com/yamcs/yamcs/commit/64392df531fbcbc65f19ee5724c4c23d289f49fc [email protected] github.com Patch
github.com/yamcs/yamcs/commit/309218c651680f79df11a8d0f8628f7033f98a83 [email protected] github.com Patch
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