CVE-2026-44556

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Source

https://cve.org/CVERecord?id=CVE-2026-44556

Import Source

https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-44556.json

JSON Data

https://api.osv.dev/v1/vulns/CVE-2026-44556

Aliases

Published

2026-05-15T19:46:17.750Z

Modified

2026-07-15T01:49:22.519604678Z

Severity

7.1 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:H CVSS Calculator

Summary

Open WebUI: responses passthrough endpoint lacks access control authorization

Details

Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.9.0, the /responses endpoint in the OpenAI router accepts any authenticated user and forwards requests directly to upstream LLM providers without enforcing per-model access control. While the primary chat completion endpoint (generatechatcompletion) checks model ownership, group membership, and AccessGrants before allowing a request, the /responses proxy only validates that the user has a valid session via getverifieduser. This allows any authenticated user to interact with any model configured on the instance by sending a POST request to /api/openai/responses with an arbitrary model ID. This vulnerability is fixed in 0.9.0.

Database specific

{
    "cwe_ids": [
        "CWE-284",
        "CWE-862"
    ],
    "cna_assigner": "GitHub_M",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/44xxx/CVE-2026-44556.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

Fixed

f31768e20e5c6b4f6da0ef657877298b359936cf

Database specific

{
    "source": [
        "AFFECTED_FIELD",
        "CPE_RANGE"
    ],
    "cpe": "cpe:2.3:a:openwebui:open_webui:*:*:*:*:*:*:*:*",
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "fixed": "0.9.0"
        }
    ]
}

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

Database specific

source

"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-44556.json"