CVE-2026-109300

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Source

https://cve.org/CVERecord?id=CVE-2026-109300

Import Source

https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-109300.json

JSON Data

https://api.osv.dev/v1/vulns/CVE-2026-109300

Aliases

GHSA-9wj4-mcm3-ppj6

Published

2026-10-12T16:04:58Z

Modified

2026-10-13T02:46:35Z

Severity

5.1 (Medium) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N CVSS Calculator

Summary

Open WebUI 0.6.31 before 0.11.4 Stored XSS via Tool-Call Embeds

Details

Open WebUI from 0.6.31 before 0.11.4 contains a stored cross-site scripting vulnerability in its Markdown renderer, which treats user-authored tool-call details blocks as tool output and mounts their embeds attribute in script-enabled iframes. Authenticated users can post crafted channel messages, chat messages, or citation content that runs JavaScript in viewers' browsers, enabling in-app phishing, or session hijacking where iframeSandboxAllowSameOrigin is enabled.

Database specific

{
    "cna_assigner":  "VulnCheck",
    "cwe_ids":  [
        "CWE-79"
    ],
    "osv_generated_from":  "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/109xxx/CVE-2026-109300.json"
}

References

Affected packages

Git / github.com/open-webui/open-webui

Affected ranges

Type

GIT

Repo

https://github.com/open-webui/open-webui

Events

Introduced

598282cf75de358215d045c617e70d28bc48929e

Fixed

8bd8b4fac5e059578ac0c74b3c18d11139f88b7d

Database specific

Show details

{
    "extracted_events":  [
        {
            "introduced":  "0.6.31"
        },
        {
            "fixed":  "0.11.4"
        }
    ],
    "source":  "AFFECTED_FIELD"
}

Affected versions

v0.*

v0.10.0

v0.10.1

v0.10.2

v0.11.0

v0.11.1

v0.11.2

v0.11.3

v0.6.31

v0.6.32

v0.6.33

v0.6.34

v0.6.35

v0.6.36

v0.6.37

v0.6.38

v0.6.39

v0.6.40

v0.6.41

v0.6.42

v0.6.43

v0.7.0

v0.7.1

v0.7.2

v0.8.0

v0.8.1

v0.8.10

v0.8.11

v0.8.12

v0.8.2

v0.8.3

v0.8.4

v0.8.5

v0.8.6

v0.8.7

v0.8.8

v0.8.9

v0.9.0

v0.9.1

v0.9.2

v0.9.3

v0.9.4

v0.9.5

Database specific

source

"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-109300.json"