CVE-2026-55641

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Source
https://cve.org/CVERecord?id=CVE-2026-55641
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-55641.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-55641
Aliases
Published
2026-07-10T15:36:05Z
Modified
2026-08-12T03:51:12Z
Severity
  • 8.2 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N CVSS Calculator
Summary
9router: Unauthenticated `/v1` proxy access via `Host`-header spoofing → open AI relay + SSRF
Details

9Router is an AI router & token saver. Prior to 0.5.2, 9router determines whether a /v1 LLM proxy request is local by reading the client-controlled Host header, allowing a remote unauthenticated attacker to send Host: localhost and bypass API-key authentication. In the default configuration, this exposes the /v1 proxy to upstream provider calls using stored provider credentials and allows /v1/search with the searxng provider_options.baseUrl parameter to drive server-side requests to internal or cloud-metadata hosts. This issue is fixed in version 0.5.2.

Database specific 
{
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
        "CWE-1327",
        "CWE-290",
        "CWE-348",
        "CWE-918"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/55xxx/CVE-2026-55641.json"
}
References

Affected packages

Git / github.com/decolua/9router

Affected ranges

Type
GIT
Repo
https://github.com/decolua/9router
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
b282f0554972ea35281520738759d76abcd0b0b3
Fixed
5da508af3c3dc6e920286141d1a4ddcd4ec245db
Database specific
Show details 
{
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "fixed": "0.5.2"
        }
    ],
    "source": [
        "AFFECTED_FIELD",
        "REFERENCES"
    ]
}

Affected versions

v0.*
v0.2.21
v0.2.27
v0.2.31
v0.2.36
v0.2.43
v0.2.52
v0.2.56
v0.2.67
v0.2.70
v0.2.71
v0.2.79
v0.2.89
v0.3.17
v0.3.34
v0.3.42
v0.3.47
v0.3.75
v0.3.83
v0.3.86
v0.3.87
v0.3.89
v0.3.90
v0.3.91
v0.3.97
v0.3.98
v0.4.1
v0.4.10
v0.4.11
v0.4.12
v0.4.13
v0.4.14
v0.4.16
v0.4.18
v0.4.19
v0.4.2
v0.4.20
v0.4.25
v0.4.27
v0.4.28
v0.4.29
v0.4.3
v0.4.30
v0.4.31
v0.4.33
v0.4.36
v0.4.37
v0.4.38
v0.4.39
v0.4.4
v0.4.41
v0.4.44
v0.4.46
v0.4.49
v0.4.50
v0.4.52
v0.4.55
v0.4.58
v0.4.59
v0.4.6
v0.4.62
v0.4.63
v0.4.66
v0.4.71
v0.4.8
v0.4.80

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-55641.json"