CVE-2026-22602Network attack vector

Authenticated full-name disclosure via unscoped user lookup

Published Jan 10, 2026 · Updated Jan 10, 2026

Information disclosure in OpenProject before 16.6.2 allows remote authenticated users to enumerate other users' full names by numeric ID. The API v3 user transition resolves a supplied identifier with User.find_by_unique! without applying the User.visible scope, exposing otherwise hidden users. A minimally privileged account and repeated requests over predictable sequential IDs are sufficient to collect an organization's full-name directory.

CVSS severity3.5
Low
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

Information disclosure in OpenProject before 16.6.2 allows remote authenticated users to enumerate other users' full names by numeric ID. The API v3 user transition resolves a supplied identifier with User.find_by_unique! without applying the User.visible scope, exposing otherwise hidden users. A minimally privileged account and repeated requests over predictable sequential IDs are sufficient to collect an organization's full-name directory.

The record

CVE
CVE-2026-22602
Published
Jan 10, 2026
Updated
Jan 10, 2026
Vendor
OpenProject GmbH
Product
OpenProject
Classifications
CWE-200, T1589.003
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jan 10, 2026CVE publishedPublication date reported by the CVE source.
  2. Jan 10, 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=< 16.6.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

OpenProject GmbH · OpenProjectversion=< 16.6.2

Published CVSS scores

3.5GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:L/UI:R/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-200Exposure of Sensitive Information to an Unauthorized Actor
T1589.003Gather Victim Identity Information: Employee Names

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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