CVE-2026-56398

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Source
https://cve.org/CVERecord?id=CVE-2026-56398
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-56398.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-56398
Aliases
Published
2026-07-15T11:25:30.722Z
Modified
2026-07-17T03:47:56.162819916Z
Severity
  • 8.5 (High) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N CVSS Calculator
Summary
Open WebUI - Stored Cross-Site Scripting via OAuth Picture Claim SVG Data URI
Details

Open WebUI before 0.9.5 contains a stored cross-site scripting vulnerability in the OAuth authentication flow where the picture claim URL MIME type is inferred from file extension rather than Content-Type header, allowing SVG files to bypass the profile image validator and be stored as data URIs. Authenticated users who visit the profile image endpoint receive attacker-controlled SVG content with inline disposition and no default security headers, enabling script execution in the same origin to steal authentication tokens and achieve account takeover.

Database specific 
{
    "cwe_ids": [
        "CWE-20"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/56xxx/CVE-2026-56398.json",
    "cna_assigner": "VulnCheck"
}
References

Affected packages

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

Affected ranges

Type
GIT
Repo
https://github.com/open-webui/open-webui
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
3660bc00fd807deced3400a63bfa6db47811a3bb
Database specific 
{
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "fixed": "0.9.5"
        }
    ],
    "source": [
        "AFFECTED_FIELD",
        "DESCRIPTION"
    ]
}

Affected versions

v0.*
v0.1.102
v0.1.103
v0.1.104
v0.1.105
v0.1.106
v0.1.107
v0.1.108
v0.1.109
v0.1.110
v0.1.111
v0.1.112
v0.1.113
v0.1.114
v0.1.115
v0.1.116
v0.1.117
v0.1.118
v0.1.119
v0.1.120
v0.1.121
v0.1.122
v0.1.123
v0.1.124
v0.1.125
v0.2.0
v0.2.1
v0.2.2
v0.2.3
v0.2.4
v0.2.5
v0.3.0
v0.3.1
v0.3.10
v0.3.11
v0.3.12
v0.3.13
v0.3.14
v0.3.15
v0.3.16
v0.3.17
v0.3.18
v0.3.19
v0.3.2
v0.3.20
v0.3.21
v0.3.22
v0.3.23
v0.3.24
v0.3.25
v0.3.26
v0.3.27
v0.3.28
v0.3.29
v0.3.3
v0.3.30
v0.3.31
v0.3.32
v0.3.33
v0.3.34
v0.3.35
v0.3.4
v0.3.5
v0.3.6
v0.3.7
v0.3.8
v0.3.9
v0.4.0
v0.4.1
v0.4.2
v0.4.3
v0.4.4
v0.4.5
v0.4.6
v0.4.7
v0.4.8
v0.5.0
v0.5.1
v0.5.10
v0.5.11
v0.5.12
v0.5.13
v0.5.14
v0.5.15
v0.5.16
v0.5.17
v0.5.18
v0.5.19
v0.5.2
v0.5.20
v0.5.3
v0.5.4
v0.5.5
v0.5.6
v0.5.7
v0.5.8
v0.5.9
v0.6.0
v0.6.1
v0.6.10
v0.6.11
v0.6.12
v0.6.13
v0.6.14
v0.6.15
v0.6.16
v0.6.17
v0.6.18
v0.6.19
v0.6.2
v0.6.20
v0.6.21
v0.6.22
v0.6.23
v0.6.24
v0.6.25
v0.6.26
v0.6.27
v0.6.28
v0.6.29
v0.6.3
v0.6.30
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
v0.6.4
v0.6.40
v0.6.41
v0.6.42
v0.6.43
v0.6.5
v0.6.6
v0.6.7
v0.6.8
v0.6.9
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

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-56398.json"