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Vulnerability details: VCID-5wzn-mfwg-ybc3
Vulnerability ID VCID-5wzn-mfwg-ybc3
Aliases CVE-2026-44558
GHSA-7rjh-px4v-5w55
Summary Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.9.0, the channel router does not call filter_allowed_access_grants on either create or update paths. A non-admin user who can create group channels (or who owns a channel) can submit arbitrary access grants — including public wildcard grants — and those grants are stored verbatim, bypassing the admin's permission framework. This vulnerability is fixed in 0.9.0.
Status Published
Exploitability None
Weighted Severity None
Risk None
Affected and Fixed Packages Package Details
Weaknesses (4)
CWE-862 Missing Authorization
CWE-863 Incorrect Authorization
CWE-937 OWASP Top Ten 2013 Category A9 - Using Components with Known Vulnerabilities
CWE-1035 OWASP Top Ten 2017 Category A9 - Using Components with Known Vulnerabilities
System Score Found at
epss 0.0003 https://api.first.org/data/v1/epss?cve=CVE-2026-44558
cvssv3.1 5.4 https://github.com/open-webui/open-webui
generic_textual MODERATE https://github.com/open-webui/open-webui
cvssv3.1 5.4 https://github.com/open-webui/open-webui/security/advisories/GHSA-7rjh-px4v-5w55
generic_textual MODERATE https://github.com/open-webui/open-webui/security/advisories/GHSA-7rjh-px4v-5w55
ssvc Track https://github.com/open-webui/open-webui/security/advisories/GHSA-7rjh-px4v-5w55
cvssv3.1 5.4 https://nvd.nist.gov/vuln/detail/CVE-2026-44558
generic_textual MODERATE https://nvd.nist.gov/vuln/detail/CVE-2026-44558
Reference id Reference type URL
https://api.first.org/data/v1/epss?cve=CVE-2026-44558
https://github.com/open-webui/open-webui
https://nvd.nist.gov/vuln/detail/CVE-2026-44558
GHSA-7rjh-px4v-5w55 https://github.com/advisories/GHSA-7rjh-px4v-5w55
GHSA-7rjh-px4v-5w55 https://github.com/open-webui/open-webui/security/advisories/GHSA-7rjh-px4v-5w55
No exploits are available.
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N Found at https://github.com/open-webui/open-webui
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
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N Found at https://github.com/open-webui/open-webui/security/advisories/GHSA-7rjh-px4v-5w55
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
Vector: SSVCv2/E:P/A:N/T:P/P:M/B:A/M:M/D:T/2026-05-19T12:40:24Z/ Found at https://github.com/open-webui/open-webui/security/advisories/GHSA-7rjh-px4v-5w55
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N Found at https://nvd.nist.gov/vuln/detail/CVE-2026-44558
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
Exploit Prediction Scoring System (EPSS)
Percentile 0.09019
EPSS Score 0.0003
Published At June 11, 2026, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2026-06-11T16:42:47.535774+00:00 Vulnrichment Import https://github.com/cisagov/vulnrichment/blob/develop/2026/44xxx/CVE-2026-44558.json 38.6.0