CVE-2026-27723: OpenProject is an open-source, web-based project management software

Routine

MEDIUM 4.3UPGRADE

CVE-2026-27723 is a medium-severity flaw (CVSS 4.3) 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, 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.

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	4.3 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.2% (top 87%)
CISA exploited list	No
Weakness	CWE-284
Published	2026-03-05
Last modified	2026-06-17

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

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-03-05 19:16 UTCPublished CVE record published
2026-06-17 10:27 UTCUpdated Record last modified

openproject openproject UPGRADE

Affected: < 17.0.5 · >= 17.1.0 and < 17.1.2

Fixed in: 17.0.5, 17.1.2

Safe to downgrade to: a release before 17.1.0

1. Check installed version

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

2. UPGRADE to 17.0.5 (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.

3. If no update is available yet, DOWNGRADE to a release before 17.1.0 (Debian / Ubuntu)

apt-cache madison openproject sudo apt install openproject=<VERSION_BEFORE_17.1.0> sudo apt-mark hold openproject

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list openproject sudo dnf downgrade openproject-<VERSION_BEFORE_17.1.0> sudo dnf versionlock add openproject

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

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-2026-27723?

openproject: upgrade to 17.0.5, 17.1.2. Exact commands for each OS are on this page.

Is CVE-2026-27723 being exploited?

CVE-2026-27723 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-2026-27723 affect?

CVE-2026-27723 affects openproject. Severity is medium (CVSS 4.3). 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

How urgent is CVE-2026-27723?

Priority 18/100. No elevated risk signals yet.

Related CVEs

CVE-2026-33667 HIGH 7.4 UPGRADE OpenProject is an open-source project management application
CVE-2026-40896 MEDIUM 6.5 UPGRADE OpenProject is open-source, web-based project management software
CVE-2026-34717 CRITICAL 9.9 UPGRADE OpenProject is an open-source, web-based project management software
CVE-2026-32703 CRITICAL 9.0 UPGRADE OpenProject is an open-source, web-based project management software
CVE-2026-32698 CRITICAL 9.1 UPGRADE OpenProject is an open-source, web-based project management software

References

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