PT-2026-41167 · Unknown · Open-Webui

Published 2026-05-09 · Updated 2026-05-16 · CVE-2026-45314

Positive Technologies (AI Summary)

CVSS v4.0

7.4

High

Base vector

AV:N/AC:L/AT:P/PR:L/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N

Name of the Vulnerable Software and Affected Versions Open WebUI versions prior to 0.9.3

Description The channel webhook create and update flow accepts arbitrary profile image url values, including base64-encoded SVG payloads. The endpoint '/api/v1/channels/webhooks/{webhook id}/profile/image' decodes and serves these SVGs as 'image/svg+xml' without sanitization. This allows attacker-controlled script handlers, such as onload, to execute in the application origin when the URL is opened in a browser, resulting in stored Cross-Site Scripting (XSS). This can lead to the exfiltration of session tokens or API keys and unauthorized actions performed on behalf of the victim.

Recommendations Update to version 0.9.3. As a temporary workaround, restrict access to the '/api/v1/channels/webhooks/{webhook id}/profile/image' endpoint or avoid using the profile image url parameter in webhook configurations until the update is applied.

Exploit

Fix

Weakness Enumeration

CWE-87

Related Identifiers

BDU:2026-07203

CVE-2026-45314

GHSA-3856-3VXQ-M6FC

Affected Products

Open-Webui

References · 9

• 🔥 https://github.com/open-webui/open-webui/security/advisories/GHSA-3856-3vxq-m6fc · Exploit
• https://bdu.fstec.ru/vul/2026-07203 · Security Note
• https://osv.dev/vulnerability/GHSA-3856-3vxq-m6fc · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-45314 · Security Note
• https://github.com/open-webui/open-webui · Note
• https://github.com/open-webui/open-webui/releases/tag/v0.9.3 · Note
• https://t.me/CVEtracker/53976 · Telegram Post
• https://twitter.com/VulmonFeeds/status/2055464726977565166 · Twitter Post
• https://twitter.com/CVEnew/status/2055457489580130447 · Twitter Post