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CVE-2026-54007

HIGH
7.1
CVSS 4.0
Description
Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.9.6, the chat message listener allows non-same-origin input:prompt and action:submit messages, so an external site can set prompt text and trigger submitPrompt() in an authenticated victim session. I validated this with a cross-origin attacker page that auto-posted messages and caused unauthorized POST /api/v1/chats/new and POST /api/chat/completions requests containing attacker-controlled prompts. This enables cross-site forced actions and model/tool execution under victim privileges without consent. This vulnerability is fixed in 0.9.6.

Metadata

CVE ID
CVE-2026-54007
State
PUBLISHED
Assigner
GitHub_M
Reserved
2026-06-11 16:34 UTC
Published
2026-06-23 16:51 UTC
Last updated
2026-06-23 16:51 UTC
Primary CWE
CWE-346
CWE-346: Origin Validation Error
Vendor / Product
open-webui / open-webui
Sources
cve.org  ·  NVD

Severity & Metrics

7.1 HIGH CVSS 4.0
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N
Affected products (1)
VendorProductPlatformVersions
open-webui open-webui — < 0.9.6
Weakness (CWE)
CWESourceDescription
CWE-346 cna CWE-346: Origin Validation Error
CVSS scores (1)
ScoreSeverityVersionSourceVector
7.1 HIGH 4.0 cna CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N
References (1)
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