Vulnerability · Published May 15, 2026 · Assigned by GitHub_M

CVE-2026-45314Open WebUI: XSS via SVG in /api/v1/channels/webhooks/{webhook_id}/profile/image

High 7.4

In plain English

A high-severity security flaw in open-webui from open-webui. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 13% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 4.0)7.4High

Exploit odds (30 days)0.2%top 87.4% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.9.3, the channel webhook create/update flow accepts arbitrary profile_image_url values, including data:image/svg+xml;base64,... payloads. The profile image endpoint then decodes and serves this SVG as image/svg+xml without sanitization, allowing attacker-controlled script handlers (for example onload) to execute when the profile-image URL is opened in the browser. This vulnerability is fixed in 0.9.3.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
PyPI	open-webui	0.9.3	GHSA-3856-3vxq-m6fc
PyPI	open-webui	0.9.3	PYSEC-2026-2694

Affected products (as reported)

Vendor	Product	Versions
open-webui	open-webui	< 0.9.3

Weakness: CWE-87 · Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N

References

https://github.com/open-webui/open-webui/security/advisories/GHSA-3856-3vxq-m6fc x_refsource_CONFIRM