CVE-2026-40896

MEDIUM

6.5

Description

OpenProject is open-source, web-based project management software. Prior to version 17.3.0, a user with `manage_agendas` permission in any project can inject agenda items into meetings belonging to any other project on the instance — even projects they have no access to. No knowledge of the target project, meeting, or victim is required; the attacker can blindly spray items into every meeting on the instance by iterating sequential section IDs. Version 17.3.0 patches the issue.

CVE Details

CVSS v3.1 Score6.5

SeverityMEDIUM

CVSS VectorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N

Attack VectorNETWORK

ComplexityLOW

Privileges RequiredLOW

User InteractionNONE

Published4/20/2026

Last Modified4/23/2026

Sourcenvd

Honeypot Sightings0

Affected Products

openproject:openproject

Weaknesses (CWE)

CWE-367CWE-639

References

https://github.com/opf/openproject/commit/8f693a1f35d0a84bb69af78fb6925f74329ae4fe(security-advisories@github.com)

https://github.com/opf/openproject/security/advisories/GHSA-hh5p-gwf8-h245(security-advisories@github.com)

https://github.com/opf/openproject/security/advisories/GHSA-hh5p-gwf8-h245(134c704f-9b21-4f2e-91b3-4a467353bcc0)

IOC Correlations

No correlations recorded

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