What’s Vulnerable › Vulnerabilities

CVE-2026-44736: OpenProject: Relations API Filter Bypasses Visibility Scope, Leaking Cross-Project Work Package Subjects

• Severity: medium (CVSS 6.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-06-26 · updated 2026-10-25
• Weakness: CWE-200

Description

OpenProject is open-source, web-based project management software. Prior to 17.4.0, the GET /api/v3/relations endpoint allows any authenticated user to retrieve relations — and the subject (title) of work packages they have no permission to view — by supplying an arbitrary work package ID in the involved, fromId, or toId filter. This bypasses the Relation.visible scope due to a flawed performance optimization in RelationQuery. This vulnerability is fixed in 17.4.0.

Affected products

• opf openproject: before 17.4.0

References

• https://github.com/opf/openproject/security/advisories/GHSA-p9gq-hrgh-2645
• https://github.com/opf/openproject/security/advisories/GHSA-p9gq-hrgh-2645

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