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| Vulnerability ID | VCID-14xt-qwyg-w3cj |
| Aliases |
CVE-2026-44552
GHSA-3x8w-4f7p-xxc2 |
| Summary | 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. |
| Status | Published |
| Exploitability | 0.5 |
| Weighted Severity | 8.0 |
| Risk | 4.0 |
| Affected and Fixed Packages | Package Details |
| System | Score | Found at |
|---|---|---|
| epss | 0.00037 | https://api.first.org/data/v1/epss?cve=CVE-2026-44552 |
| epss | 0.00037 | https://api.first.org/data/v1/epss?cve=CVE-2026-44552 |
| cvssv3.1_qr | HIGH | https://github.com/advisories/GHSA-3x8w-4f7p-xxc2 |
| cvssv3.1 | 8.7 | https://github.com/open-webui/open-webui |
| generic_textual | HIGH | https://github.com/open-webui/open-webui |
| cvssv3.1 | 8.7 | https://github.com/open-webui/open-webui/security/advisories/GHSA-3x8w-4f7p-xxc2 |
| cvssv3.1_qr | HIGH | https://github.com/open-webui/open-webui/security/advisories/GHSA-3x8w-4f7p-xxc2 |
| generic_textual | HIGH | https://github.com/open-webui/open-webui/security/advisories/GHSA-3x8w-4f7p-xxc2 |
| ssvc | Track | https://github.com/open-webui/open-webui/security/advisories/GHSA-3x8w-4f7p-xxc2 |
| cvssv3.1 | 8.7 | https://nvd.nist.gov/vuln/detail/CVE-2026-44552 |
| generic_textual | HIGH | https://nvd.nist.gov/vuln/detail/CVE-2026-44552 |
| Reference id | Reference type | URL |
|---|---|---|
| https://api.first.org/data/v1/epss?cve=CVE-2026-44552 | ||
| https://github.com/open-webui/open-webui | ||
| https://nvd.nist.gov/vuln/detail/CVE-2026-44552 | ||
| GHSA-3x8w-4f7p-xxc2 | https://github.com/advisories/GHSA-3x8w-4f7p-xxc2 | |
| GHSA-3x8w-4f7p-xxc2 | https://github.com/open-webui/open-webui/security/advisories/GHSA-3x8w-4f7p-xxc2 |
| Attack Vector (AV) | Attack Complexity (AC) | Privileges Required (PR) | User Interaction (UI) | Scope (S) | Confidentiality Impact (C) | Integrity Impact (I) | Availability Impact (A) |
|---|---|---|---|---|---|---|---|
network adjacent_network local physical |
low high |
none low high |
none required |
unchanged changed |
high low none |
high low none |
high low none |
| Attack Vector (AV) | Attack Complexity (AC) | Privileges Required (PR) | User Interaction (UI) | Scope (S) | Confidentiality Impact (C) | Integrity Impact (I) | Availability Impact (A) |
|---|---|---|---|---|---|---|---|
network adjacent_network local physical |
low high |
none low high |
none required |
unchanged changed |
high low none |
high low none |
high low none |
| Attack Vector (AV) | Attack Complexity (AC) | Privileges Required (PR) | User Interaction (UI) | Scope (S) | Confidentiality Impact (C) | Integrity Impact (I) | Availability Impact (A) |
|---|---|---|---|---|---|---|---|
network adjacent_network local physical |
low high |
none low high |
none required |
unchanged changed |
high low none |
high low none |
high low none |
| Percentile | 0.1142 |
| EPSS Score | 0.00037 |
| Published At | June 11, 2026, 12:55 p.m. |
| Date | Actor | Action | Source | VulnerableCode Version |
|---|---|---|---|---|
| 2026-06-11T16:42:42.783647+00:00 | Vulnrichment | Import | https://github.com/cisagov/vulnrichment/blob/develop/2026/44xxx/CVE-2026-44552.json | 38.6.0 |