Authenticated session invalidation via ownerless deletion query
Published Jun 25, 2026 · Updated Jun 25, 2026
Authorization bypass in Kanboard 1.2.52 and earlier allows remote authenticated users to delete other users' persistent login sessions. UserViewController::removeSession passes a sequential session id to RememberMeSessionModel::remove, whose deletion query filters only by id and omits the authenticated owner's user id. Any logged-in app user with a valid CSRF token can enumerate ids and force users, including administrators, to reauthenticate; the flaw does not disclose data or enable account takeover.
Summary
What happened
Authorization bypass in Kanboard 1.2.52 and earlier allows remote authenticated users to delete other users' persistent login sessions. UserViewController::removeSession passes a sequential session id to RememberMeSessionModel::remove, whose deletion query filters only by id and omits the authenticated owner's user id. Any logged-in app user with a valid CSRF token can enumerate ids and force users, including administrators, to reauthenticate; the flaw does not disclose data or enable account takeover.
The record
- CVE
- CVE-2026-56774
- Published
- Jun 25, 2026
- Updated
- Jun 25, 2026
- Vendor
- Kanboard
- Product
- Kanboard
- Classifications
- CWE-639
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Jun 25, 2026CVE publishedPublication date reported by the CVE source.
- Jun 25, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
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- Affected versionversion=0 <=1.2.52
What conditions does exploitation require?
What is affected?
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
- Issue 5829 authenticated HTTP reproductionfunctional · demonstrated
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Technologies
Your stack
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Your stack
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