CVE-2026-51956Network attack vector

Cross-tenant record read and modification via unchecked ID

Published Sep 1, 2026 · Updated Sep 2, 2026

Broken object-level authorization in Grashjs Atlas CMMS before 1.6.0 allows remote authenticated users to read or modify company records. CompanyController.getById and patch trusted the numeric path ID and returned or updated the resolved Company without comparing its tenant to the requester's company. Any authenticated tenant user could substitute another company's ID to disclose or alter that company's profile data, without affecting availability.

CVSS severity8.1
High
EPSS probability0.23%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Broken object-level authorization in Grashjs Atlas CMMS before 1.6.0 allows remote authenticated users to read or modify company records. CompanyController.getById and patch trusted the numeric path ID and returned or updated the resolved Company without comparing its tenant to the requester's company. Any authenticated tenant user could substitute another company's ID to disclose or alter that company's profile data, without affecting availability.

The record

CVE
CVE-2026-51956
Published
Sep 1, 2026
Updated
Sep 2, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-284, T1565.001, T1213
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 1, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 2, 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

8.1NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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 exploitUnconfirmed

Weakness, pattern, technique

CWE-284Improper Access Control
T1565.001Stored Data Manipulation
T1213Data from Information Repositories

Public exploit references

No public exploit references are available in this record.

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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