EUVD-2026-64174Severity by source
AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
Low-privilege authenticated session required to trigger; impact is solely availability loss from object locking with no confidentiality or integrity compromise.
Primary rating from Vendor (GitHub_M).
CVSS VectorVendor: GitHub_M
Lifecycle Timeline
3DescriptionCVE.org
Combodo iTop is a web based IT service management tool. Prior to 3.2.3, an object can be locked by a user who is not assigned write permissions. This issue has been fixed in version 3.2.3.
AnalysisAI
Object locking in Combodo iTop prior to version 3.2.3 can be triggered by any authenticated user regardless of assigned write permissions, enabling targeted denial-of-service against legitimate editors. The missing authorization check in the lock acquisition endpoint (ajax.render.php) allows low-privilege users to lock objects they have no right to modify, blocking users who do hold write permissions from editing those objects. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires a valid authenticated session in the target iTop instance - no write, admin, or elevated permissions are needed, only a basic user account (PR:L). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The NVD-assigned CVSS 3.1 score of 4.3 (AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L) accurately characterizes the limited scope: exploitation requires authenticated access (PR:L) and yields only partial availability impact with no confidentiality or integrity compromise. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Upgrade to Combodo iTop version 3.2.3, which adds a pre-lock authorization check confirming that the requesting user holds UR_ACTION_MODIFY rights on the target object class before the lock is granted. … Detailed patch versions, workarounds, and compensating controls in full report. |
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Same weakness CWE-862 – Missing Authorization
View allSame technique Authentication Bypass
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External POC / Exploit Code
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