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TI-2026-29552 Aliases CVE-2026-40896

OpenProject has Cross-Project Meeting Agenda Item Injection via Unscoped Section Lookup

Priority MEDIUM 64CWE-367Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Security bypass
Confidentiality · integrity · availability
Low · High · None
Fix status
Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-639.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00174 6th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed openproject (opf): 17.3.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
opfopenprojectbefore 17.3.017.3.0Patch availableCNA
  • openproject Vendoropf Affected before 17.3.0 Fixed in 17.3.0 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:openproject:openproject:*:*:*:*:*:*:*:*before 17.3.0Vulnerableopf
  • cpe:2.3:a:openproject:openproject:*:*:*:*:*:*:*:* Versions before 17.3.0 Vulnerable ·opf

Remediation

  • Fix · CNA openproject (opf) Fixed in 17.3.0

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-40896

References

Exploit 1

Patch 1

  • TI-2019-08673 A SQL injection vulnerability in the activities API in OpenProject before 8.3.2 allows a… CVSS 3.0HIGH 8.1
  • TI-2026-26047 OpenProject: 2FA OTP Verification Missing Rate Limiting CVSS 3.1HIGH 7.4
  • TI-2023-14850 OpenProject user sessions not terminated after activation of 2FA CVSS 3.1MEDIUM 6.5
  • TI-2026-18162 OpenProject is Vulnerable to Code Execution in E-Mail function CVSS 4.0HIGH 8.6
  • TI-2026-26961 OpenProject: SQL Injection in Cost Reporting =n Operator via parse_number_string CVSS 3.1CRITICAL 9.9
  • TI-2026-20830 Command Injection on OpenProject repositories leads to Remote Code Execution CVSS 4.0CRITICAL 9.4
See all 36 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences