CVE-2026-44595 | Yamcs is a mission control framework. Prior to 5.12.7, the I… | CVSS 4.3 MEDIUM

Description

Yamcs is a mission control framework. Prior to 5.12.7, the IAM API endpoints listUsers, getUser, listGroups, and getGroup in yamcs-core did not enforce the required SystemPrivilege.ControlAccess check in yamcs-core/src/main/java/org/yamcs/http/api/IamApi.java, so any authenticated user, even one with low or no privileges, could enumerate all user accounts in the system including their usernames, superuser status, and group memberships. This issue is fixed in versions 5.12.7 and 5.13.0.

Metadata

CVE ID: CVE-2026-44595
State: PUBLISHED
Assigner: GitHub_M
Reserved: 2026-05-06 21:49 UTC
Published: 2026-07-16 16:02 UTC
Last updated: 2026-07-16 16:02 UTC
Primary CWE: CWE-862
CWE-862: Missing Authorization
Vendor / Product: yamcs / yamcs
Sources: cve.org · NVD

Severity & Metrics

4.3 MEDIUM CVSS 3.1

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

Affected products (1)

Vendor	Product	Platform	Versions
yamcs	yamcs	—	< 5.12.7

Weakness (CWE)

CWE	Source	Description
CWE-862	cna	CWE-862: Missing Authorization

CVSS scores (1)

Score	Severity	Version	Source	Vector
4.3	MEDIUM	3.1	cna	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

References (5)

https://github.com/yamcs/yamcs/security/advisories/GHSA-p2rj-mrmc-9w29 https://github.com/yamcs/yamcs/security/advisories/GHSA-p2rj-mrmc-9w29
https://github.com/yamcs/yamcs/commit/0e12b518f103f24681299318a30a460fe4327b88 https://github.com/yamcs/yamcs/commit/0e12b518f103f24681299318a30a460fe4327b88
https://github.com/yamcs/yamcs/commit/e90099fba98e96214217c195b6a5b87b5f46e51c https://github.com/yamcs/yamcs/commit/e90099fba98e96214217c195b6a5b87b5f46e51c
https://github.com/yamcs/yamcs/releases/tag/yamcs-5.12.7 https://github.com/yamcs/yamcs/releases/tag/yamcs-5.12.7
https://github.com/yamcs/yamcs/releases/tag/yamcs-5.13.0 https://github.com/yamcs/yamcs/releases/tag/yamcs-5.13.0