CVE-2026-26192Public exploitNetwork attack vector

Stored XSS via permissive citation iframe sandbox

Published Feb 19, 2026 · Updated Feb 19, 2026

Stored XSS in Open WebUI before 0.7.0 allows remote authenticated users to execute scripts when a victim previews a crafted citation. CitationModal.svelte trusts a user-set metadata.html flag and assigns the document body to iframe srcdoc with scripts and same-origin enabled. An authenticated attacker must alter saved chat history and induce another user to open the source and select the document, enabling session-token theft.

CVSS severity7.3
High
EPSS probability0.19%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored XSS in Open WebUI before 0.7.0 allows remote authenticated users to execute scripts when a victim previews a crafted citation. CitationModal.svelte trusts a user-set metadata.html flag and assigns the document body to iframe srcdoc with scripts and same-origin enabled. An authenticated attacker must alter saved chat history and induce another user to open the source and select the document, enabling session-token theft.

The record

CVE
CVE-2026-26192
Published
Feb 19, 2026
Updated
Feb 19, 2026
Vendor
Open WebUI
Product
Open WebUI
Classifications
CWE-79, T1203
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 19, 2026CVE publishedPublication date reported by the CVE source.
  2. Feb 19, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 0.7.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Open WebUI · Open WebUIversion=< 0.7.0

Published CVSS scores

7.3GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N
5.4NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1203Exploitation for Client Execution

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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