CVE-2026-33667: OpenProject is an open-source project management application

Q: How do I fix CVE-2026-33667?

openproject: upgrade to 17.3.0. Exact commands for each OS are on this page.

Q: Is CVE-2026-33667 being exploited?

CVE-2026-33667 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-33667 affect?

CVE-2026-33667 affects openproject. Severity is high (CVSS 7.4). 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 tra

Q: How urgent is CVE-2026-33667?

Priority 41/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

This week

HIGH 7.4REMOTEUPGRADE

CVE-2026-33667 is a high-severity flaw (CVSS 7.4) affecting openproject. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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 tracking. The existing brute_force_block_after_failed_logins setting only counts password login failures and does not apply to the 2FA verification stage, and neither the fail_login nor stage_failure methods incre

Why this priority

High severity
Public exploit reference
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	7.4 (High)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	None
User interaction	None
EPSS exploit chance	0.3% (top 78%)
CISA exploited list	No
Weakness	CWE-307
Published	2026-04-15
Last modified	2026-10-26

Publisher (CNA): GitHub, Inc. · Vendor: openproject

Last updated 2026-10-26 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-04-15 19:16 UTCPublished CVE record published
2026-10-26 22:10 UTCUpdated Record last modified

openproject openproject UPGRADE

Affected: < 17.3.0

Fixed in: 17.3.0

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy openproject || rpm -q openproject || openproject --version

2. UPGRADE to 17.3.0 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade openproject

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade openproject

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-33667?

openproject: upgrade to 17.3.0. Exact commands for each OS are on this page.

Is CVE-2026-33667 being exploited?

CVE-2026-33667 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-33667 affect?

CVE-2026-33667 affects openproject. Severity is high (CVSS 7.4). 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 tra

How urgent is CVE-2026-33667?

Priority 41/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

Related CVEs

CVE-2026-40896 MEDIUM 6.5 UPGRADE OpenProject is open-source, web-based project management software

References

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