{"id":"CVE-2026-87995","title":"Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform","summary":"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-…","severity":"high","cvss":8.7,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N","cwe":["CWE-79","CWE-1021"],"vendor":"openwebui","product":"open_webui","affected":["open_webui >= 0.8.11, < 0.11.1"],"patched":["open_webui 0.11.1"],"published":"2026-09-09","updated":"2026-09-16","sourceUpdated":"2026-09-16T15:14:57.400","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-87995","references":[{"url":"https://github.com/open-webui/open-webui/commit/54d7a223707f03172efbb9e754db6e69709956d0","label":"security-advisories@github.com"},{"url":"https://github.com/open-webui/open-webui/releases/tag/v0.11.1","label":"security-advisories@github.com"},{"url":"https://github.com/open-webui/open-webui/security/advisories/GHSA-jmc6-2wr8-h3wj","label":"security-advisories@github.com"},{"url":"https://github.com/open-webui/open-webui/security/advisories/GHSA-jmc6-2wr8-h3wj","label":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"tags":["nvd","cve.org","exploit-available"],"epss":0.00229,"epssPercentile":0.13992,"exploitAvailable":true,"ssvc":{"exploitation":"poc","automatable":"no","technicalImpact":"total","timestamp":"2026-09-10T17:54:14.915324Z"},"ingestedAt":"2026-09-12T17:21:46.532Z","slug":"CVE-2026-87995","body":"## Overview\n\nOpen 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.\n\n## Affected\n\n- `open_webui >= 0.8.11, < 0.11.1`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `open_webui 0.11.1`","depth":"midnight","depthScore":60,"depthScoreParts":{"impact":47.8,"likelihood":0,"exploitation":12,"ransomware":0},"changes":[{"seq":52147,"id":"CVE-2026-87995","ts":1789063373392,"field":"exploit_available","old":"false","new":"true"}]}