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| Vulnerability ID | VCID-chug-ma8r-cucc |
| Aliases |
CVE-2026-44557
GHSA-6c2x-gcp3-gp73 |
| Summary | Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.9.0, the _validate_collection_access function uses an incomplete allowlist that only enforces ownership checks for collections matching user-memory-* and file-* patterns. All other collection names pass through unchecked — including the system-level knowledge-bases meta-collection, which stores the IDs, names, and descriptions of every knowledge base on the instance. Any authenticated user can query this meta-collection directly via the retrieval query endpoints to obtain a global index of all knowledge bases across all users. This vulnerability is fixed in 0.9.0. |
| Status | Published |
| Exploitability | 0.5 |
| Weighted Severity | 6.2 |
| Risk | 3.1 |
| Affected and Fixed Packages | Package Details |
| System | Score | Found at |
|---|---|---|
| epss | 0.0003 | https://api.first.org/data/v1/epss?cve=CVE-2026-44557 |
| epss | 0.0003 | https://api.first.org/data/v1/epss?cve=CVE-2026-44557 |
| cvssv3.1_qr | MODERATE | https://github.com/advisories/GHSA-6c2x-gcp3-gp73 |
| cvssv3.1 | 4.3 | https://github.com/open-webui/open-webui |
| generic_textual | MODERATE | https://github.com/open-webui/open-webui |
| cvssv3.1 | 4.3 | https://github.com/open-webui/open-webui/security/advisories/GHSA-6c2x-gcp3-gp73 |
| cvssv3.1_qr | MODERATE | https://github.com/open-webui/open-webui/security/advisories/GHSA-6c2x-gcp3-gp73 |
| generic_textual | MODERATE | https://github.com/open-webui/open-webui/security/advisories/GHSA-6c2x-gcp3-gp73 |
| ssvc | Track | https://github.com/open-webui/open-webui/security/advisories/GHSA-6c2x-gcp3-gp73 |
| cvssv3.1 | 4.3 | https://nvd.nist.gov/vuln/detail/CVE-2026-44557 |
| generic_textual | MODERATE | https://nvd.nist.gov/vuln/detail/CVE-2026-44557 |
| Reference id | Reference type | URL |
|---|---|---|
| https://api.first.org/data/v1/epss?cve=CVE-2026-44557 | ||
| https://github.com/open-webui/open-webui | ||
| https://nvd.nist.gov/vuln/detail/CVE-2026-44557 | ||
| GHSA-6c2x-gcp3-gp73 | https://github.com/advisories/GHSA-6c2x-gcp3-gp73 | |
| GHSA-6c2x-gcp3-gp73 | https://github.com/open-webui/open-webui/security/advisories/GHSA-6c2x-gcp3-gp73 |
| 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 | 0.09019 |
| EPSS Score | 0.0003 |
| Published At | June 11, 2026, 12:55 p.m. |
| Date | Actor | Action | Source | VulnerableCode Version |
|---|---|---|---|---|
| 2026-06-11T16:42:46.228051+00:00 | Vulnrichment | Import | https://github.com/cisagov/vulnrichment/blob/develop/2026/44xxx/CVE-2026-44557.json | 38.6.0 |