What is CVE-2026-27723?

CVE-2026-27723 is a medium-severity vulnerability in Openproject, classified under Improper Access Control. CVSS score: 4.3/10. Published 2026-03-05.

How severe is CVE-2026-27723?

Medium severity. CVSS v3 base score is 4.3 out of 10.

Vulnerability in Openproject

CVE-2026-27723

OpenProject is an open-source, web-based project management software. Prior to versions 17.0.5 and 17.1.2, an attacker can create wiki pages belonging to unpermitted projects through an improperly authenticated request. This issue has been patched in versions 17.0.5 and 17.1.2.

Published 2026-03-05 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N.

EPSS exploit prediction

EPSS: 0.004 (27.1th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 27th percentile — 27.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.002 · newest: 0.004 · change: +0.001

Affected products

Openproject
Opf Openproject — versions < 17.0.5, < 17.1.2

Weakness classification (CWE)

CWE-284 — Improper Access Control

References

github.com/opf/openproject/security/advisories/GHSA-9gc6-3xjq-pwc9 (Vendor Advisory)
github.com/opf/openproject/releases/tag/v17.0.5 (Product, Release Notes)
github.com/opf/openproject/releases/tag/v17.1.2 (Product, Release Notes)

Frequently asked questions

What is CVE-2026-27723?: CVE-2026-27723 is a medium-severity vulnerability in Openproject, classified under Improper Access Control. CVSS score: 4.3/10. Published 2026-03-05.
How severe is CVE-2026-27723?: Medium severity. CVSS v3 base score is 4.3 out of 10.