VulnSocial

CVE-2026-109290

LOWCVSS 8.4 · HIGH

Signal is active with 1 mentions in latest observed window

Immediate actions

  • Track advisory updates for patch or workaround availability

Recommended action window: Monitor and triage in normal cycle

NVD description

Open WebUI from 0.11.1 before 0.11.4 contains a stored cross-site scripting vulnerability in DocxPreview.svelte that allows authenticated users to execute script by uploading crafted DOCX attachments. Attackers can embed an OOXML altChunk HTML part or script-scheme hyperlink to steal a previewing administrator's session token from local storage and take over the instance.

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0.0/ 10 priority

Sources & remediation

Other references
Weakness type (CWE)
CWE-79

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

NONE

Momentum

NONE

Threat summary

  • 1 mentions across 1 observed day

What's happening

  • 1 total mentions across 1 day

Deep dive

Activity timeline1 mentions / 1d
00111Mentions · 2026-10-14: 110-14
Referenced assets1 URL
By indicator
Full discourse1 post
  • CCB Alert@CCBalert

    Warning: High-severity XSS flaws in #OpenWebUI! CVE-2026-109291, CVE-2026-109286 & CVE-2026-109290 allow session hijacking & account takeover. #Patch #Patch #Patch More info: https://github.com/open-webui/open-webui/releases/tag/v0.11.4

    00001145
    7.3K followersView on X

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