HOMEVULNERABILITIESCVE-2026-56774
MEDIUM

CVE-2026-56774

CWE-639Published: June 25, 2026· Updated: Jun 25, 2026

5.4
CVSS v3.1
EPSS:0.27%probability of exploitation in 30 daysPercentile:17.9th

Official Description

Kanboard through 1.2.52, fixed in commit 928c68a, UserViewController::removeSession fails to validate the session id parameter before passing it to RememberMeSessionModel::remove, allowing authenticated users to delete other users' Remember Me sessions. Attackers can enumerate sequential session IDs and mass-invalidate persistent login sessions of any user, including administrators, forcing re-authentication and causing denial of service.

NVD Source

Technical Analysis

CVE-2026-56774 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.Low
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityNone
IntegrityLow
AvailabilityLow
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
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All References (4)

→
https://github.com/kanboard/kanboard/commit/928c68aa2b7c00092dd71084d329b912e229f3d1
→
https://github.com/kanboard/kanboard/issues/5829
→
https://github.com/kanboard/kanboard/pull/5831
→
https://www.vulncheck.com/advisories/kanboard-cross-user-deletion-of-persistent-login-sessions-via-unvalidated-session-id

Quick Facts

CVE IDCVE-2026-56774
CVSS Score5.4 / 10
SeverityMEDIUM
WeaknessCWE-639
CISA KEVNo
EPSS (30d)0.27%
PublishedJun 25, 2026

Related CVEs (CWE-639)

CVE-2026-52782
9.9
CVE-2026-55255
KEV9.9
CVE-2026-29200
9.9
CVE-2026-45552
9.9
CVE-2018-25270
9.8
CVE-2026-41267
9.8

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2026-56774 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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