What’s Vulnerable › Vulnerabilities

CVE-2026-40896: OpenProject has Cross-Project Meeting Agenda Item Injection via Unscoped Section Lookup

• Severity: high (CVSS 7.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2026-04-20 · updated 2026-10-26
• Weakness: CWE-367

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.

Affected products

• opf openproject: before 17.3.0 — fixed in 17.3.0

How to fix

Upgrade to a fixed version: opf openproject 17.3.0. Check the vendor advisory for mitigations.

References

• https://github.com/opf/openproject/commit/8f693a1f35d0a84bb69af78fb6925f74329ae4fe
• https://github.com/opf/openproject/security/advisories/GHSA-hh5p-gwf8-h245
• https://github.com/opf/openproject/security/advisories/GHSA-hh5p-gwf8-h245

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