CVE-2026-30843: Wekan is an open source kanban tool built with Meteor

Routine

MEDIUM 6.5DOWNGRADE

CVE-2026-30843 is a medium-severity flaw (CVSS 6.5) affecting wekan. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Wekan is an open source kanban tool built with Meteor. Versions 8.32 and 8.33 have a critical Insecure Direct Object Reference (IDOR) issue which could allow unauthorized users to modify custom fields across boards through its custom fields update endpoints, potentially leading to unauthorized data manipulation. The PUT /api/boards/:boardId/custom-fields/:customFieldId endpoint in Wekan validates that the authenticated user has access to the spec

Why this priority

No elevated risk signals yet

No fix is published yet: follow the downgrade or mitigation steps.

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 87%)
CISA exploited list	No
Weakness	CWE-639
Published	2026-03-06
Last modified	2026-06-17

Publisher (CNA): GitHub, Inc. · Vendor: wekan project

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

Am I affected?

Timeline

2026-03-06 20:16 UTCPublished CVE record published
2026-06-17 10:33 UTCUpdated Record last modified

wekan project wekan DOWNGRADE

Affected: 8.32 · 8.33

Fixed in: no fixed release known

Safe to downgrade to: a release before 8.32

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 8.32 (Debian / Ubuntu)

apt-cache madison wekan sudo apt install wekan=<VERSION_BEFORE_8.32> sudo apt-mark hold wekan

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list wekan sudo dnf downgrade wekan-<VERSION_BEFORE_8.32> sudo dnf versionlock add wekan

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-2026-30843?

wekan: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2026-30843 being exploited?

CVE-2026-30843 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-2026-30843 affect?

CVE-2026-30843 affects wekan. Severity is medium (CVSS 6.5). Wekan is an open source kanban tool built with Meteor. Versions 8.32 and 8.33 have a critical Insecure Direct Object Reference (IDOR) issue which could allow unauthorized users to modify custom fields across boards through its custom fields

How urgent is CVE-2026-30843?

Priority 26/100. No elevated risk signals yet.

Related CVEs

CVE-2025-65781 HIGH 8.2 UPGRADE An issue was discovered in Wekan The Open Source kanban board system up to version 18.15, fixed in 18.16
CVE-2025-65780 HIGH 8.8 UPGRADE An issue was discovered in Wekan The Open Source kanban board system up to version 18.15, fixed in 18.16
CVE-2025-65779 HIGH 7.5 UPGRADE An issue was discovered in Wekan The Open Source kanban board system up to version 18.15, fixed in 18.16
CVE-2025-65778 HIGH 8.1 UPGRADE An issue was discovered in Wekan The Open Source kanban board system up to version 18.15, fixed in 18.16
CVE-2025-65782 MEDIUM 6.5 UPGRADE An issue was discovered in Wekan The Open Source kanban board system up to version 18.15, fixed in 18.16

References

← Back to latest CVEs