CVE-2026-45339

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Source

https://cve.org/CVERecord?id=CVE-2026-45339

Import Source

https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-45339.json

JSON Data

https://api.osv.dev/v1/vulns/CVE-2026-45339

Aliases

GHSA-57q6-fvp4-pqmm

Published

2026-05-15T19:21:26.401Z

Modified

2026-07-08T08:13:29.498492994Z

Severity

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

Summary

Open WebUI: API key endpoint restrictions bypassed via `x-api-key` header — full message processing on restricted endpoints

Details

Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.9.0, Open WebUI allows admins to restrict which API endpoints an API key can access. When an API key is restricted from /api/v1/messages, requests using the Authorization: Bearer sk-... header are correctly blocked with 403. However, the same key sent via the x-api-key header bypasses the restriction entirely — the request is authenticated, the model is invoked, and a full response is returned. This vulnerability is fixed in 0.9.0.

Database specific

{
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/45xxx/CVE-2026-45339.json",
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
        "CWE-863"
    ]
}

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

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

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-2026-45339.json"