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Combodo iTop CVE-2026-34836

| EUVDEUVD-2026-64184 MEDIUM
Missing Authorization (CWE-862)
2026-08-21 GitHub_M
PHP Authentication Bypass Itop
6.5
CVSS 3.1 · Vendor: GitHub_M
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Severity by source

Vendor (GitHub_M) PRIMARY
6.5 MEDIUM
AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
vuln.today AI
6.5 MEDIUM

Network-reachable AJAX endpoint requires only a low-privileged session; pure read bypass yields high confidentiality loss with no integrity or availability impact.

3.1 AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
4.0 AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

Primary rating from Vendor (GitHub_M).

CVSS VectorVendor: GitHub_M

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None

Lifecycle Timeline

3
Source Code Evidence Fetched
Aug 21, 2026 - 22:31 vuln.today
Analysis Generated
Aug 21, 2026 - 22:31 vuln.today
Patch available
Aug 21, 2026 - 22:17 EUVD

DescriptionCVE.org

Combodo iTop is a web based IT service management tool. Prior to 3.2.3, improper access control in ajax.render.php and ajax.document.php allows for document access without checking on user permissions. This issue has been fixed in version 3.2.3.

AnalysisAI

Unauthorized document access in Combodo iTop before version 3.2.3 allows any authenticated user to retrieve documents and attachments belonging to organizations or objects they lack permission to view. The root cause is a logic inversion in the PHP DownloadDocument method: a host-object rights check could silently pass due to incorrect boolean handling, bypassing the intended access control gate entirely. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
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Delivery
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Exploit
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Execution
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Impact
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Vulnerability AssessmentAI

Exploitation Exploitation requires a valid authenticated session in Combodo iTop - the CVSS PR:L metric confirms at minimum a low-privileged account is needed. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The CVSS 6.5 score (AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N) accurately reflects the threat: network-reachable, low complexity, requires only a low-privileged account, and produces high confidentiality loss with no integrity or availability impact. … 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 Combodo iTop to version 3.2.3 or later, which contains the access control fix committed at https://github.com/Combodo/iTop/commit/77915853875710f152a873842fa2a84ebd09719b and detailed in the advisory at https://github.com/Combodo/iTop/security/advisories/GHSA-2gvp-4cv3-cx6j. … Detailed patch versions, workarounds, and compensating controls in full report.
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CVE-2026-34836 vulnerability details – vuln.today
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