CVE-2026-58446

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Source
https://cve.org/CVERecord?id=CVE-2026-58446
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-58446.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-58446
Published
2026-06-30T21:05:15Z
Modified
2026-08-12T03:51:11Z
Severity
  • 6.9 (Medium) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N CVSS Calculator
Summary
Presenton < 0.8.8-beta - Authentication Bypass of Session Auth via Unprotected MCP Endpoint
Details

Presenton before 0.8.8-beta bundles an MCP server that, on server/Docker deployments configured with session authentication (AUTH_USERNAME/AUTH_PASSWORD), is reachable unauthenticated at /mcp because the nginx front-end does not apply the auth_request gate to that path and the MCP server auto-mints a valid internal session token for the configured user. A remote unauthenticated attacker can invoke MCP tools such as generate_presentation, performing authenticated application actions, consuming the operators configured LLM API keys, and creating presentations in the operators instance. The Electron desktop build is not affected (MCP disabled).

Database specific 
{
    "cna_assigner": "VulnCheck",
    "cwe_ids": [
        "CWE-306"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/58xxx/CVE-2026-58446.json"
}
References

Affected packages

Git / github.com/presenton/presenton

Affected ranges

Type
GIT
Repo
https://github.com/presenton/presenton
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
c1cdd7b8d0c922621e65094aaaebde4fbeb89095
Fixed
a1103dcef3c761cc8bab44e2862c81a49969abd7
Database specific
Show details 
{
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "fixed": "0.8.8-beta"
        }
    ],
    "source": [
        "DESCRIPTION",
        "REFERENCES"
    ]
}

Affected versions

0.*
0.5.10
electron-v0.*
electron-v0.6.0-beta
electron-v0.6.2-beta
electron-v0.6.3-beta
electron-v0.7.0-beta
electron-v0.7.1-beta
electron-v0.7.2-beta
electron-v0.7.3-beta
electron-v0.8.6-beta
v0.*
v0.1.0-beta
v0.2.0-beta
v0.2.1-beta
v0.3.0-beta
v0.3.2-beta
v0.3.4-beta
v0.3.5-beta
v0.3.6-beta
v0.3.7-beta
v0.4.0-beta
v0.4.1-beta
v0.4.3-beta
v0.4.4-beta
v0.4.5-beta
v0.4.7-beta
v0.4.8-beta
v0.5.0-beta
v0.5.1-beta
v0.5.11-beta
v0.5.12-beta
v0.5.14-beta
v0.5.15-beta
v0.5.16-beta
v0.5.17-beta
v0.5.18-beta
v0.5.2-beta
v0.5.3-beta
v0.5.4-beta
v0.5.5
v0.5.6-beta
v0.5.7-beta
v0.5.8-beta
v0.5.9-beta
v0.7.3-beta
v0.8.0-beta
v0.8.1-beta
v0.8.2-beta
v0.8.3-beta
v0.8.4-beta
v0.8.5-beta
v0.8.6-beta
v0.8.8-beta

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-58446.json"