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Vulnerability details: VCID-9jud-sr2a-8yc3
Vulnerability ID VCID-9jud-sr2a-8yc3
Aliases CVE-2026-44549
GHSA-jwf8-pv5p-vhmc
Summary Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.8.0, Excel file attachments are previewed in an unsafe way. A crafted XLSX file payload can be used to cause the sheetjs function sheet_to_html to embed an XSS payload into the generated HTML. This is subsequently added to the DOM unsanitized via @html causing the payload to trigger. This vulnerability is fixed in 0.8.0.
Status Published
Exploitability None
Weighted Severity None
Risk None
Affected and Fixed Packages Package Details
Weaknesses (3)
CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
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 0.00012 https://api.first.org/data/v1/epss?cve=CVE-2026-44549
cvssv3.1 7.3 https://github.com/open-webui/open-webui
generic_textual HIGH https://github.com/open-webui/open-webui
cvssv3.1 7.3 https://github.com/open-webui/open-webui/security/advisories/GHSA-jwf8-pv5p-vhmc
generic_textual HIGH https://github.com/open-webui/open-webui/security/advisories/GHSA-jwf8-pv5p-vhmc
ssvc Track* https://github.com/open-webui/open-webui/security/advisories/GHSA-jwf8-pv5p-vhmc
cvssv3.1 7.3 https://nvd.nist.gov/vuln/detail/CVE-2026-44549
generic_textual HIGH https://nvd.nist.gov/vuln/detail/CVE-2026-44549
Reference id Reference type URL
https://api.first.org/data/v1/epss?cve=CVE-2026-44549
https://github.com/open-webui/open-webui
https://nvd.nist.gov/vuln/detail/CVE-2026-44549
GHSA-jwf8-pv5p-vhmc https://github.com/advisories/GHSA-jwf8-pv5p-vhmc
GHSA-jwf8-pv5p-vhmc https://github.com/open-webui/open-webui/security/advisories/GHSA-jwf8-pv5p-vhmc
No exploits are available.
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/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:R/S:U/C:H/I:H/A:N Found at https://github.com/open-webui/open-webui/security/advisories/GHSA-jwf8-pv5p-vhmc
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:T/P:M/B:A/M:M/D:R/2026-05-18T12:47:08Z/ Found at https://github.com/open-webui/open-webui/security/advisories/GHSA-jwf8-pv5p-vhmc
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N Found at https://nvd.nist.gov/vuln/detail/CVE-2026-44549
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 0.01593
EPSS Score 0.00012
Published At June 11, 2026, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2026-06-11T16:42:40.425852+00:00 Vulnrichment Import https://github.com/cisagov/vulnrichment/blob/develop/2026/44xxx/CVE-2026-44549.json 38.6.0