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© 2026 FAUCET Technologies LLC. All rights reserved.

CVE-2026-44595

32
FAUCET Score

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.

First published: Jul 16, 2026Last modified: Jul 16, 2026

Impacted Technologies

VendorProductVersion(s)CPE
< 5.12.7CPE matchmatch criteria
cpe:2.3:a:spaceapplications:yamcs:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

4.3MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
2.8
Impact Score
1.4
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.98%
Probability of exploitation in next 30 days
EPSS Percentile
58.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-24
Model: v2026.06.15
ExploitDB: EDB-52604 · May 30, 2026
This CVE's current EPSS score of 0.0098 is in the 73rd percentile among its peer group of 21,939 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

github_advisorypatch availablevia nvd_reference
View patch
mavenpatch availablevia ghsa
Product: org.yamcs:yamcs-coreFixed in: 5.12.7

Vendor Advisories (1)

mavenGHSA-p2rj-mrmc-9w29medium

Yamcs vulnerable to unauthorized user enumeration via IAM API endpoints

May 27, 2026

References

github.com / yamcs/yamcs/commit/0e12b518f103f24681299318a30a460fe4327b88
Patch
github.com / yamcs/yamcs/commit/e90099fba98e96214217c195b6a5b87b5f46e51c
Patch
github.com / yamcs/yamcs/releases/tag/yamcs-5.12.7
Release Notes
github.com / yamcs/yamcs/releases/tag/yamcs-5.13.0
Release Notes
github.com / yamcs/yamcs/security/advisories/GHSA-p2rj-mrmc-9w29
ExploitVendor Advisory