What is CVE-2026-52779?

CVE-2026-52779 is a medium-severity vulnerability in Opf Openproject, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 5.4/10. Published 2026-06-26.

How severe is CVE-2026-52779?

Medium severity. CVSS v3 base score is 5.4 out of 10.

Auth bypass in Opf Openproject

CVE-2026-52779

OpenProject is open-source, web-based project management software. Prior to 17.3.3 and 17.4.1, a cross-project IDOR / authorization context confusion in the Calendar and Team Planner modules allows a user with management permissions in one…

Vulnerability class: IDOR (Insecure Direct Object Reference)

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L.

Affected products

Opf Openproject — versions < 17.3.3, >= 17.4.0, < 17.4.1

Weakness classification (CWE)

CWE-639 — Authorization Bypass Through User-Controlled Key
CWE-863 — Incorrect Authorization

References

security-advisories@github.com (x_refsource_CONFIRM)

Frequently asked questions

What is CVE-2026-52779?: CVE-2026-52779 is a medium-severity vulnerability in Opf Openproject, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 5.4/10. Published 2026-06-26.
How severe is CVE-2026-52779?: Medium severity. CVSS v3 base score is 5.4 out of 10.