CVE Explorer
CVE-2026-45318
Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.9.3, his advisory tracks a regression of the original Excel-preview XSS (CVE-2026-44549). The same root cause — XLSX.utils.sheet_to_html() output rendered via {@html excelHtml} without DOMPurify — was reintroduced sometime after v0.8.0 and is exploitable again This vulnerability is fixed in 0.9.3.
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0
Affected products and versions
1 source assertion{"product":"open-webui","vendor":"open-webui","versions":[{"status":"affected","version":"< 0.9.3"}]}
- cve_program_cvelist_v5affectedurn:baitaphish:normalized-source-record:v2:0ff36dd9f80718b4d5a1e51fcfbc1662da1f8e423fbddc617a696fd657eda40b · sha256:ab5fe050f68a6332… · /containers/cna/affected/0
Provider-owned CVSS observations
1 source assertion{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":5.4,"baseSeverity":"MEDIUM","confidentialityImpact":"LOW","integrityImpact":"LOW","privilegesRequired":"LOW","scope":"CHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N","version":"3.1"},"metric_type":"cvssV3_1"}
- cve_program_cvelist_v5cvssurn:baitaphish:normalized-source-record:v2:0ff36dd9f80718b4d5a1e51fcfbc1662da1f8e423fbddc617a696fd657eda40b · sha256:ab5fe050f68a6332… · /containers/cna/metrics/0/cvssV3_1
CWE assertions
1 source assertion{"cweId":"CWE-79","description":"CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')","lang":"en","type":"CWE"}
- cve_program_cvelist_v5cweurn:baitaphish:normalized-source-record:v2:0ff36dd9f80718b4d5a1e51fcfbc1662da1f8e423fbddc617a696fd657eda40b · sha256:ab5fe050f68a6332… · /containers/cna/problemTypes/0/descriptions/0
Source references
2 source assertions{"tags":["exploit"],"url":"https://github.com/open-webui/open-webui/security/advisories/GHSA-hcwp-82g6-8wxc"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:0ff36dd9f80718b4d5a1e51fcfbc1662da1f8e423fbddc617a696fd657eda40b · sha256:ab5fe050f68a6332… · /containers/adp/0/references/0
{"name":"https://github.com/open-webui/open-webui/security/advisories/GHSA-hcwp-82g6-8wxc","tags":["x_refsource_CONFIRM"],"url":"https://github.com/open-webui/open-webui/security/advisories/GHSA-hcwp-82g6-8wxc"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:0ff36dd9f80718b4d5a1e51fcfbc1662da1f8e423fbddc617a696fd657eda40b · sha256:ab5fe050f68a6332… · /containers/cna/references/0
Attribution and limitations
- CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →
Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.