{"cve":"CVE-2026-44595","nvd":{"published":"2026-07-16T17:16:55.740","modified":"2026-07-18T03:16:35.680","status":"Modified","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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N","score":4.3},"cwes":["CWE-862"],"references":["https://github.com/yamcs/yamcs/commit/0e12b518f103f24681299318a30a460fe4327b88","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-5.13.0","https://github.com/yamcs/yamcs/security/advisories/GHSA-p2rj-mrmc-9w29"],"products":["spaceapplications:yamcs"],"source":"nvd","synced_at":"2026-10-19T22:45:36.895656543+00:00"},"epss":{"cve":"CVE-2026-44595","score":0.01057,"percentile":0.64473,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-p2rj-mrmc-9w29","url":"https://osv.dev/vulnerability/GHSA-p2rj-mrmc-9w29","summary":"Yamcs vulnerable to unauthorized user enumeration via IAM API endpoints","modified":"2026-05-27T00:26:30.097435Z","packages":[{"ecosystem":"Maven","name":"org.yamcs:yamcs-core","purl":"pkg:maven/org.yamcs/yamcs-core","ranges":["<5.12.7"],"fixed":["5.12.7"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}