What is CVE-2026-33667?

CVE-2026-33667 is a high-severity vulnerability in Openproject, classified under Improper Restriction of Excessive Authentication Attempts. CVSS score: 7.4/10. Published 2026-04-15.

How severe is CVE-2026-33667?

High severity. CVSS v3 base score is 7.4 out of 10.

Vulnerability in Openproject

CVE-2026-33667

OpenProject is an open-source project management application. In versions prior to 17.3.0, 2FA OTP verification in the confirm_otp action of the two_factor_authentication module has no rate limiting, lockout mechanism, or failed-attempt tr…

EPSS: 0.001 (23.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.4 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N.

Affected products

Openproject
Opf Openproject — versions < 17.3.0

Weakness classification (CWE)

CWE-307 — Improper Restriction of Excessive Authentication Attempts

References

https://github.com/opf/openproject/security/advisories/GHSA-234r-45m2-w6cv (x_refsource_CONFIRM, Exploit, Mitigation, Vendor Advisory)

Frequently asked questions

What is CVE-2026-33667?: CVE-2026-33667 is a high-severity vulnerability in Openproject, classified under Improper Restriction of Excessive Authentication Attempts. CVSS score: 7.4/10. Published 2026-04-15.
How severe is CVE-2026-33667?: High severity. CVSS v3 base score is 7.4 out of 10.