open-webui Open WebUI up to 0.8.x Server Configuration utils/tools.py tool_servers/terminal_servers exposure of resource

CVSS Meta Temp Score
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CTI Interest Score
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6.6$0-$5k0.00

Summaryinfo

A vulnerability labeled as problematic has been found in open-webui Open WebUI up to 0.8.x. This affects an unknown function of the file utils/tools.py of the component Server Configuration Handler. Such manipulation of the argument tool_servers/terminal_servers leads to exposure of resource. This vulnerability is uniquely identified as CVE-2026-44552. The attack can be launched remotely. No exploit exists. The affected component should be upgraded.

Detailsinfo

A vulnerability was found in open-webui Open WebUI up to 0.8.x and classified as problematic. Affected by this issue is an unknown part of the file utils/tools.py of the component Server Configuration Handler. The manipulation of the argument tool_servers/terminal_servers with an unknown input leads to a exposure of resource vulnerability. Using CWE to declare the problem leads to CWE-668. The product exposes a resource to the wrong control sphere, providing unintended actors with inappropriate access to the resource. Impacted is confidentiality, integrity, and availability. CVE summarizes:

Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.9.0, the tool_servers and terminal_servers keys in utils/tools.py do use a prefix. When two or more Open WebUI instances share a Redis database (a supported and documented deployment pattern, e.g., for multi-region deployments, blue-green setups, or cluster topologies), the unprefixed keys collide. An admin on Instance A writing to tool_servers overwrites the value read by Instance B — causing Instance B's users to receive Instance A's tool server configuration. This vulnerability is fixed in 0.9.0.

The advisory is available at github.com. This vulnerability is handled as CVE-2026-44552 since 05/06/2026. The exploitation is known to be easy. The attack may be launched remotely. Additional levels of successful authentication are required for exploitation. Technical details are known, but there is no available exploit.

Upgrading to version 0.9.0 eliminates this vulnerability.

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Productinfo

Vendor

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.7
VulDB Meta Temp Score: 6.6

VulDB Base Score: 4.7
VulDB Temp Score: 4.5
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 8.7
CNA Vector (GitHub_M): 🔒

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Exposure of resource
CWE: CWE-668 / CWE-200 / CWE-284
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Open WebUI 0.9.0

Timelineinfo

05/06/2026 CVE reserved
05/16/2026 +10 days Advisory disclosed
05/16/2026 +0 days VulDB entry created
05/16/2026 +0 days VulDB entry last update

Sourcesinfo

Advisory: GHSA-3x8w-4f7p-xxc2
Status: Confirmed

CVE: CVE-2026-44552 (🔒)
GCVE (CVE): GCVE-0-2026-44552
GCVE (VulDB): GCVE-100-364262

Entryinfo

Created: 05/16/2026 06:41
Changes: 05/16/2026 06:41 (66)
Complete: 🔍
Cache ID: 216::103

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