CVE-2026-44595Public exploitNetwork attack vector

Authenticated account enumeration via missing IAM authorization

Published Jul 16, 2026 · Updated Jul 16, 2026

Missing authorization in the Yamcs IAM API before 5.12.7 allows remote authenticated users to enumerate user accounts and groups. The listUsers, getUser, listGroups, and getGroup handlers in IamApi.java return directory records without enforcing SystemPrivilege.ControlAccess. Any authenticated account, including one with no assigned privileges, can learn usernames, superuser status, and group memberships; no data modification is exposed.

CVSS severity4.3
Medium
EPSS probability1.06%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Missing authorization in the Yamcs IAM API before 5.12.7 allows remote authenticated users to enumerate user accounts and groups. The listUsers, getUser, listGroups, and getGroup handlers in IamApi.java return directory records without enforcing SystemPrivilege.ControlAccess. Any authenticated account, including one with no assigned privileges, can learn usernames, superuser status, and group memberships; no data modification is exposed.

The record

CVE
CVE-2026-44595
Published
Jul 16, 2026
Updated
Jul 16, 2026
Vendor
Space Applications Services
Product
Yamcs
Classifications
CWE-862, T1087, T1069
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 16, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 16, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 5.12.7

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Space Applications Services · Yamcsversion=< 5.12.7

Published CVSS scores

4.3GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-862Missing Authorization
T1087Account Discovery
T1069Permission Groups Discovery

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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