CVE-2026-66005

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Source
https://cve.org/CVERecord?id=CVE-2026-66005
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-66005.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-66005
Published
2026-07-24T14:57:33.054Z
Modified
2026-07-27T04:03:24.074615115Z
Severity
  • 5.3 (Medium) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N CVSS Calculator
Summary
Jan Local API Server CORS Origin Reflection via 0.0.0.0 Binding
Details

Jan through 0.8.4, fixed in commit 3e1c1e7, contains a CORS misconfiguration vulnerability in its local API server that allows network-adjacent attackers to bypass trusted host restrictions by exploiting the server's replacement of user-configured trusted hosts with a wildcard that reflects arbitrary origins with credentials. Attackers on the local network or using DNS rebinding can reach the unauthenticated OpenAI-compatible API to perform inference, enumerate models, invoke MCP tools, and read cross-origin responses.

Database specific 
{
    "cna_assigner": "VulnCheck",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/66xxx/CVE-2026-66005.json",
    "cwe_ids": [
        "CWE-183",
        "CWE-942"
    ]
}
References

Affected packages

Git / github.com/janhq/jan

Affected ranges

Type
GIT
Repo
https://github.com/janhq/jan
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
5f30aee467f08941964a83f946e2663e7ae0e01f
Fixed
3e1c1e724f696620d89bb4a9cc18a380e0753757
Database specific 
{
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "fixed": "0.8.4"
        }
    ],
    "source": [
        "DESCRIPTION",
        "REFERENCES"
    ]
}

Affected versions

core-0.*
core-0.1.1
core-0.1.10
core-0.1.2
core-0.1.3
core-0.1.4
core-0.1.5
core-0.1.6
core-0.1.7
core-0.1.8
core-0.1.9
data-plugin-1.*
data-plugin-1.0.10
data-plugin-1.0.11
data-plugin-1.0.12
data-plugin-1.0.13
data-plugin-1.0.14
data-plugin-1.0.15
data-plugin-1.0.16
data-plugin-1.0.18
data-plugin-1.0.19
data-plugin-1.0.2
data-plugin-1.0.3
data-plugin-1.0.6
data-plugin-1.0.7
data-plugin-1.0.8
data-plugin-1.0.9
inference-plugin-1.*
inference-plugin-1.0.10
inference-plugin-1.0.11
inference-plugin-1.0.12
inference-plugin-1.0.13
inference-plugin-1.0.14
inference-plugin-1.0.16
inference-plugin-1.0.17
inference-plugin-1.0.18
inference-plugin-1.0.19
inference-plugin-1.0.2
inference-plugin-1.0.20
inference-plugin-1.0.21
inference-plugin-1.0.3
inference-plugin-1.0.4
inference-plugin-1.0.7
inference-plugin-1.0.8
inference-plugin-1.0.9
model-management-plugin-1.*
model-management-plugin-1.0.11
model-management-plugin-1.0.12
model-management-plugin-1.0.13
model-management-plugin-1.0.2
model-management-plugin-1.0.3
model-management-plugin-1.0.4
model-management-plugin-1.0.7
model-management-plugin-1.0.8
model-management-plugin-1.0.9
monitoring-plugin-1.*
monitoring-plugin-1.0.2
monitoring-plugin-1.0.3
monitoring-plugin-1.0.6
monitoring-plugin-1.0.8
monitoring-plugin-1.0.9
openai-plugin-1.*
openai-plugin-1.0.2
openai-plugin-1.0.3
openai-plugin-1.0.6
openai-plugin-1.0.7
plugin-core-0.*
plugin-core-0.1.4
plugin-core-0.1.5
plugin-core-0.1.6
plugin-core-0.1.7
plugin-core-0.1.8
retrieval-plugin-1.*
retrieval-plugin-1.0.1
retrieval-plugin-1.0.2
retrieval-plugin-1.0.3
v0.*
v0.1.1
v0.1.2
v0.1.3
v0.2.0
v0.2.1
v0.2.2
v0.2.3
v0.3.0
v0.3.1
v0.3.2
v0.3.3
v0.4.0
v0.4.1
v0.4.10
v0.4.11
v0.4.12
v0.4.13
v0.4.14
v0.4.2
v0.4.3
v0.4.4
v0.4.5
v0.4.6
v0.4.7
v0.4.8
v0.4.9
v0.5.0
v0.5.1
v0.5.10-rc1-beta
v0.5.11-rc2-beta
v0.5.14-rc1-beta
v0.5.16-rc1-beta
v0.5.17
v0.5.17-rc1-beta

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-66005.json"