High 8.7Published Sep 9, 2026

CVE-2026-87995Open WebUI: Same-origin XSS to account takeover via terminal port-preview iframe hardcoding allow-same-origin

Updated under an hour ago (2026-10-19 06:10 UTC)

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It affects open-webui and 1 other product. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for open-webui

Exploited in the last 30 days

Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.8.11 until 0.11.1, src/lib/components/chat/FileNav/PortPreview.svelte rendered terminal port content in an iframe sandbox containing both allow-scripts and allow-same-origin. Because the terminal proxy serves that content from the Open WebUI origin, an authenticated user with access to a shared terminal server could host script on a previewed port and take over a victim's account when the victim opened the preview. This issue is fixed in version 0.11.1.

CVSS: 8.7 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N
Weakness (CWE): CWE-79, CWE-1021
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Analyzed
Record last updated: Sep 10, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

open-webui open-webui open_webui:open_webui (from the name)	from 0.8.11, < 0.11.1	CNA record
openwebui open_webui openwebui:open_webui	from 0.8.11 before 0.11.1	NVD

References

https://github.com/open-webui/open-webui/security/advisories/GHSA-jmc6-2wr8-h3wjx-refsource-confirm, exploit, vendor-advisory
https://github.com/open-webui/open-webui/commit/54d7a223707f03172efbb9e754db6e69709956d0x-refsource-misc, patch
https://github.com/open-webui/open-webui/releases/tag/v0.11.1x-refsource-misc, release-notes

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.