CVE-2026-52779Public exploitNetwork attack vector

Cross-project query deletion via mismatched authorization context

Published Jun 26, 2026 · Updated Jun 26, 2026

Incorrect authorization in OpenProject before 17.3.3 and OpenProject 17.4.0 allows remote authenticated users to delete shared queries. The Calendar and Team Planner controllers authorize the URL's :project_id, then load Query.visible(current_user) by :id without checking that the query belongs to that project. Management rights in one project and visibility of a public query in another are sufficient to erase shared views and disrupt dependent planning workflows.

CVSS severity5.4
Medium
EPSS probability0.31%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Incorrect authorization in OpenProject before 17.3.3 and OpenProject 17.4.0 allows remote authenticated users to delete shared queries. The Calendar and Team Planner controllers authorize the URL's :project_id, then load Query.visible(current_user) by :id without checking that the query belongs to that project. Management rights in one project and visibility of a public query in another are sufficient to erase shared views and disrupt dependent planning workflows.

The record

CVE
CVE-2026-52779
Published
Jun 26, 2026
Updated
Jun 26, 2026
Vendor
OpenProject GmbH
Product
OpenProject
Classifications
CWE-863, CWE-639, T1485
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 26, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 26, 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=< 17.3.3
  2. Affected versionversion=>= 17.4.0, < 17.4.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

OpenProject GmbH · OpenProjectversion=< 17.3.3; version=>= 17.4.0, < 17.4.1

Published CVSS scores

5.4GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L

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-863Incorrect Authorization
CWE-639Authorization Bypass Through User-Controlled Key
T1485Data Destruction

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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