Open WebUI: Cross-Site Request Forgery (CSRF) via Image URL Manipulation

published 2026-05-14 5 mo ago modified 2026-07-13 3 mo ago also EUVD-2026-30658 , GHSA-j6w6-986j-2m2m , PYSEC-2026-2738

cvss: 4.6; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.2%; EPSS 0.2% chance of exploitation in 30 days, percentile 5%
public exploits: 0; none known

Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.9.3, an application-wide Cross-Site Request Forgery (CSRF) vulnerability was found Open-WebUl's image uploading functionality. An attacker can set an image URL to a malicious endpoint, allowing them to perform actions on behalf of a victim user. Any authenticated user can exploit this vulnerability, and any user who views the compromised image (e.g., a profile picture) will unknowingly send a GET request to the attacker-controlled URL. This can lead to cookie theft, denial of service (DoS), or other malicious actions. This vulnerability is fixed in 0.9.3.

Patch / fix

fixed in 2 links 1

pypi open-webui 0.9.3
openwebui open_webui 0.9.3

github.com/open-webui/open-webui/releases/tag/v0.9.3 release

CISA SSVC

Exploitation: Proof of concept is public
Automatable: no
Technical impact: partial
Assessed: 5 mo ago (2026-05-18)

Exploit prediction

0.17% chance of exploitation in the next 30 days, higher than 5% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

github.com https://github.com/open-webui/open-webui/security/advisories/GHSA-j6w6-986j-2m2m referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
CNA	3.1	4.6	CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:L
GitHub	3.1	4.6	CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:L
OSV	3.1	4.6	CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:L

Affected packages

ecosystem	package	affected	fixed in
pypi	open-webui	<0.9.3	0.9.3

Affected products

open-webui open-webui

Classification

Weakness

CWE-20 Improper Input Validation
CWE-352 Cross-Site Request Forgery

References

github.com /open-webui/open-webui/security/advisories/GHSA-j6w6-986j-2m2m
exploit, web, mitigation, vendor-advisory
nvd.nist.gov /vuln/detail/CVE-2026-45317
advisory
github.com /open-webui/open-webui
package
github.com /open-webui/open-webui/releases/tag/v0.9.3
web
pypi.org /project/open-webui
package
github.com /advisories/GHSA-j6w6-986j-2m2m
advisory

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.

Summary