CVE-2026-77339

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Source
https://cve.org/CVERecord?id=CVE-2026-77339
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-77339.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-77339
Aliases
Published
2026-09-18T16:37:19Z
Modified
2026-09-20T11:47:26Z
Severity
  • 5.1 (Medium) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:L/VI:L/VA:N/SC:L/SI:H/SA:N CVSS Calculator
Summary
Process Compose: Browser DNS rebinding lets websites control local process-compose MCP tools
Details

Process Compose is a scheduler and orchestrator for non-containerized applications. Prior to 1.120.0, the MCP SSE listener in src/mcp/server.go accepts browser-origin requests to /sse and the returned message endpoint without validating the Host header, validating the Origin header, or authenticating the caller. When MCP SSE is enabled, a malicious website can use DNS rebinding to reach the loopback listener and issue MCP requests. If expose_control_tools is enabled, the attacker can enumerate process state, read or search logs, truncate logs, and start, stop, restart, or scale local processes; configured user-defined tools can expose additional commands and output. The Gin REST API token middleware does not protect this separately started MCP listener. This issue is fixed in version 1.120.0.

Database specific 
{
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
        "CWE-306",
        "CWE-346"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/77xxx/CVE-2026-77339.json"
}
References

Affected packages

Git / github.com/f1bonacc1/process-compose

Affected ranges

Type
GIT
Repo
https://github.com/f1bonacc1/process-compose
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
6ffa74f462cd2fa4f8dc1ee63c70b793b298c858
Fixed
0f3a8e6868f592f044a2ecd9387ff3025825ad46
Database specific
Show details 
{
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "fixed": "1.120.0"
        }
    ],
    "source": [
        "AFFECTED_FIELD",
        "REFERENCES"
    ]
}

Affected versions

v0.*
v0.10.1
v0.10.2
v0.15.0
v0.16.0
v0.17.0
v0.20.0
v0.21.0
v0.24.0
v0.24.1
v0.28.0
v0.29.0
v0.29.1
v0.29.4
v0.29.5
v0.29.7
v0.4.2
v0.40.0
v0.40.1
v0.40.2
v0.43.1
v0.45.0
v0.5.2
v0.51.0
v0.51.4
v0.6.0
v0.60.0
v0.65.1
v0.69.0
v0.75.0
v0.75.1
v0.77.4
v0.77.8
v0.8.0
v0.80.0
v0.81.4
v0.85.0
v0.88.0
v1.*
v1.0.0
v1.0.1
v1.100.0
v1.103.0
v1.110.0
v1.116.0
v1.18.0
v1.2.0
v1.24.0
v1.24.2
v1.27.0
v1.34.0
v1.40.1
v1.46.0
v1.5.0
v1.6.1
v1.63.0
v1.64.1
v1.73.0
v1.75.0
v1.75.2
v1.76.0
v1.76.1
v1.78.0
v1.85.0
v1.87.0
v1.9.0
v1.90.0
v1.94.0

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-77339.json"