CVE-2026-40896: OpenProject is open-source, web-based project management software

Q: How do I fix CVE-2026-40896?

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

Q: Is CVE-2026-40896 being exploited?

CVE-2026-40896 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-2026-40896 affect?

CVE-2026-40896 affects openproject. Severity is medium (CVSS 6.5). OpenProject is open-source, web-based project management software. Prior to version 17.3.0, a user with `manage_agendas` permission in any project can inject agenda items into meetings belonging to any other project on the instance — even p

Q: How urgent is CVE-2026-40896?

Priority 29/100. Public exploit reference

Routine

MEDIUM 6.5UPGRADE

CVE-2026-40896 is a medium-severity flaw (CVSS 6.5) affecting openproject. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

OpenProject is open-source, web-based project management software. Prior to version 17.3.0, a user with `manage_agendas` permission in any project can inject agenda items into meetings belonging to any other project on the instance — even projects they have no access to. No knowledge of the target project, meeting, or victim is required; the attacker can blindly spray items into every meeting on the instance by iterating sequential section IDs. V

Why this priority

Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	6.5 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.2% (top 93%)
CISA exploited list	No
Weakness	CWE-367, CWE-639
Published	2026-04-20
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

2026-04-20 16:16 UTCPublished CVE record published
2026-10-26 21:10 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-2026-40896?

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

Is CVE-2026-40896 being exploited?

CVE-2026-40896 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-2026-40896 affect?

CVE-2026-40896 affects openproject. Severity is medium (CVSS 6.5). OpenProject is open-source, web-based project management software. Prior to version 17.3.0, a user with `manage_agendas` permission in any project can inject agenda items into meetings belonging to any other project on the instance — even p

How urgent is CVE-2026-40896?

Priority 29/100. Public exploit reference

Related CVEs

CVE-2026-33667 HIGH 7.4 UPGRADE OpenProject is an open-source project management application

References

← Back to latest CVEs