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Open WebUI CVE-2026-87013

| EUVDEUVD-2026-75172 MEDIUM
Loop with Unreachable Exit Condition (Infinite Loop) (CWE-835)
2026-09-09 GitHub_M GHSA-8r35-5x5r-hv74
4.3
CVSS 3.1 · Vendor: GitHub_M
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Severity by source

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

Indefinite resource exhaustion that persists in the database until manually repaired warrants A:H, not A:L; all other metrics match the provided vector.

3.1 AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
4.0 AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/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
None
Integrity
None
Availability
Low

Lifecycle Timeline

3
Patch available
Sep 09, 2026 - 22:04 EUVD
Source Code Evidence Fetched
Sep 09, 2026 - 21:44 vuln.today
Analysis Generated
Sep 09, 2026 - 21:44 vuln.today

DescriptionCVE.org

Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.10.0 until 0.11.1, POST /api/v1/folders/{id}/update/parent allowed a user to place a folder under itself or one of its descendants, while the folder tree walks used by DELETE /api/v1/folders/{id} and POST /api/v1/folders/{id}/read did not track visited folder identifiers. An authenticated user could persist a parent cycle and start a request that consumed CPU and memory indefinitely, with the condition remaining stored until repaired. This issue is fixed in version 0.11.1.

AnalysisAI

Infinite CPU and memory exhaustion in Open WebUI 0.10.0-0.11.0 allows any authenticated user to trigger a persistent server-side denial of service by exploiting missing cycle detection in the folder tree API. The folder parent-update endpoint accepted self-referential or descendant-referential reparenting requests, storing a circular linked structure in the database. …

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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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Persist
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Impact
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Vulnerability AssessmentAI

Exploitation Exploitation requires a valid authenticated session on the Open WebUI instance (PR:L); anonymous access is not sufficient. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The provided CVSS 4.3 (AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L) understates the 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 Open WebUI to version 0.11.1, which resolves the vulnerability by adding cycle detection at all folder traversal sites and a validation guard on the parent-update endpoint. … Detailed patch versions, workarounds, and compensating controls in full report.

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CVE-2026-87013 vulnerability details – vuln.today

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