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PatchSiren cyber security CVE debrief

CVE-2026-55234 wekan CVE debrief

CVE-2026-55234 is a high-severity vulnerability in Wekan, a Meteor-based open-source kanban platform. An authorization bypass issue allows any authenticated Wekan user with write access to their own board to move cards, lists, or swimlanes into a private board they are not a member of. This issue is fixed in Wekan version 9.37. The vulnerability exists due to insufficient validation of the new boardId in the update modifier, allowing unauthorized access to private boards.

Vendor
wekan
Product
Unknown
CVSS
HIGH 8.5
CISA KEV
Not listed in stored evidence
Original CVE published
2026-07-15
Original CVE updated
2026-07-16
Advisory published
2026-07-15
Advisory updated
2026-07-16

Who should care

Users of Wekan, especially those with write access to boards, should be aware of this vulnerability and ensure they are running version 9.37 or later to prevent unauthorized access to private boards. Wekan administrators and security teams should review the vulnerability and implement necessary mitigations.

Technical summary

The vulnerability exists in the DDP (Distributed Data Protocol) update rules in server/permissions/cards.js, server/permissions/lists.js, and server/permissions/swimlanes.js. These rules authorize updates based on the stored source boardId without validating the new boardId in the update modifier. This allows an authenticated user with write access to their own board to call /cards/update, /lists/update, or /swimlanes/update and move items into a private board they are not a member of. The issue is fixed in Wekan version 9.37.

Defensive priority

High

Recommended defensive actions

  • Upgrade to Wekan version 9.37 or later
  • Restrict write access to boards for users who should not have it
  • Monitor board updates for suspicious activity
  • Implement additional access controls to prevent unauthorized board access
  • Review compensating controls for exposed systems while remediation is scheduled and verified
  • Check relevant monitoring, detection, and logs for exposed assets that need extra review
  • Track exceptions, retest remediated assets, and close the item only after evidence is documented

Evidence notes

The CVE record was published on 2026-07-15T22:17:25.880Z and last modified on 2026-07-16T16:19:13.690Z. The NVD entry is currently Deferred. There is limited information available about the vulnerability, and defenders should verify the affected scope and severity with the vendor. The issue is fixed in Wekan version 9.37.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-55234 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-55234

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-55234 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-55234

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.