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Vulnerability Details :

CVE-2026-44552

Summary
Assigner-GitHub_M
Assigner Org ID-a0819718-46f1-4df5-94e2-005712e83aaa
Published At-15 May, 2026 | 19:57
Updated At-15 May, 2026 | 19:57
Rejected At-
Credits

Open WebUI: Redis Cache Keys tool_servers and terminal_servers Missing Instance Prefix Enable Cross-Instance Cache Poisoning

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.

Vendors
-
Not available
Products
-
Metrics (CVSS)
VersionBase scoreBase severityVector
Weaknesses
Attack Patterns
Solution/Workaround
References
HyperlinkResource Type
EPSS History
Score
Latest Score
-
N/A
No data available for selected date range
Percentile
Latest Percentile
-
N/A
No data available for selected date range
Stakeholder-Specific Vulnerability Categorization (SSVC)
▼Common Vulnerabilities and Exposures (CVE)
cve.org
Assigner:GitHub_M
Assigner Org ID:a0819718-46f1-4df5-94e2-005712e83aaa
Published At:15 May, 2026 | 19:57
Updated At:15 May, 2026 | 19:57
Rejected At:
▼CVE Numbering Authority (CNA)
Open WebUI: Redis Cache Keys tool_servers and terminal_servers Missing Instance Prefix Enable Cross-Instance Cache Poisoning

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.

Affected Products
Vendor
open-webui
Product
open-webui
Versions
Affected
  • < 0.9.0
Problem Types
TypeCWE IDDescription
CWECWE-668CWE-668: Exposure of Resource to Wrong Sphere
Type: CWE
CWE ID: CWE-668
Description: CWE-668: Exposure of Resource to Wrong Sphere
Metrics
VersionBase scoreBase severityVector
3.18.7HIGH
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:N
Version: 3.1
Base score: 8.7
Base severity: HIGH
Vector:
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:N
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
https://github.com/open-webui/open-webui/security/advisories/GHSA-3x8w-4f7p-xxc2
x_refsource_CONFIRM
Hyperlink: https://github.com/open-webui/open-webui/security/advisories/GHSA-3x8w-4f7p-xxc2
Resource:
x_refsource_CONFIRM
Information is not available yet
▼National Vulnerability Database (NVD)
nvd.nist.gov
Source:security-advisories@github.com
Published At:15 May, 2026 | 20:16
Updated At:15 May, 2026 | 20:16

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.

CISA Catalog
Date AddedDue DateVulnerability NameRequired Action
N/A
Date Added: N/A
Due Date: N/A
Vulnerability Name: N/A
Required Action: N/A
Metrics
TypeVersionBase scoreBase severityVector
Secondary3.18.7HIGH
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:N
Type: Secondary
Version: 3.1
Base score: 8.7
Base severity: HIGH
Vector:
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:N
CPE Matches
Weaknesses
CWE IDTypeSource
CWE-668Primarysecurity-advisories@github.com
CWE ID: CWE-668
Type: Primary
Source: security-advisories@github.com
Evaluator Description
Evaluator Impact

Evaluator Solution

Vendor Statements
References
HyperlinkSourceResource
https://github.com/open-webui/open-webui/security/advisories/GHSA-3x8w-4f7p-xxc2security-advisories@github.com
N/A
Hyperlink: https://github.com/open-webui/open-webui/security/advisories/GHSA-3x8w-4f7p-xxc2
Source: security-advisories@github.com
Resource: N/A

Change History

0
Information is not available yet

Similar CVEs

1Records found
CVE-2023-26458
Matching Score-4
Assigner-SAP SE
ShareView Details
Matching Score-4
Assigner-SAP SE
CVSS Score-6.8||MEDIUM
EPSS-0.34% / 56.43%
||
7 Day CHG~0.00%
Published-11 Apr, 2023 | 02:34
Updated-07 Feb, 2025 | 19:33
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available
Information Disclosure vulnerability in SAP Landscape Management

An information disclosure vulnerability exists in SAP Landscape Management - version 3.0, enterprise edition. It allows an authenticated SAP Landscape Management user to obtain privileged access to other systems making those other systems vulnerable to information disclosure and modification.The disclosed information is for Diagnostics Agent Connection via Java SCS Message Server of an SAP Solution Manager system and can only be accessed by authenticated SAP Landscape Management users, but they can escalate their privileges to the SAP Solution Manager system.

Action-Not Available
Vendor-SAP SE
Product-landscape_managementLandscape Management
CWE ID-CWE-668
Exposure of Resource to Wrong Sphere
Details not found