CVE-2026-41160Public exploitNetwork attack vector

Authenticated note manipulation via delayed authorization

Published May 28, 2026 · Updated May 28, 2026

Broken access control in EspoCRM before 9.3.5 allows remote authenticated users to pin notes without parent-object edit access. In application/Espo/Tools/Stream/Api/PostNotePin.php, process() pins and saves the note before checkParent() verifies permission. A low-privileged account with note visibility is sufficient, and the unauthorized database change persists even though the API returns 403.

CVSS severity4.3
Medium
EPSS probability0.29%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Broken access control in EspoCRM before 9.3.5 allows remote authenticated users to pin notes without parent-object edit access. In application/Espo/Tools/Stream/Api/PostNotePin.php, process() pins and saves the note before checkParent() verifies permission. A low-privileged account with note visibility is sufficient, and the unauthorized database change persists even though the API returns 403.

The record

CVE
CVE-2026-41160
Published
May 28, 2026
Updated
May 28, 2026
Vendor
EspoCRM
Product
EspoCRM
Classifications
CWE-284, CWE-862, CWE-639, T1565.001
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. May 28, 2026CVE publishedPublication date reported by the CVE source.
  2. May 28, 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=< 9.3.5

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

EspoCRM · EspoCRMversion=< 9.3.5

Published CVSS scores

4.3GitHubCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/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-284Improper Access Control
CWE-862Missing Authorization
CWE-639Authorization Bypass Through User-Controlled Key
T1565.001Data Manipulation: Stored Data Manipulation

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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