CVE-2026-66750

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Source
https://cve.org/CVERecord?id=CVE-2026-66750
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-66750.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-66750
Published
2026-07-28T15:33:04.344Z
Modified
2026-08-01T03:32:58.794502272Z
Severity
  • 5.3 (Medium) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N CVSS Calculator
Summary
Let's Chat 0.3.0 - 0.4.8 Broken Access Control File Disclosure via GET /files route
Details

Let's Chat 0.3.0 through 0.4.8 contains a broken access control vulnerability that allows authenticated attackers to download file attachments from private and password-protected rooms they are not a member of by exploiting missing room membership checks in the file retrieval route. Attackers can enumerate adjacent MongoDB ObjectIds derived from a known file ID to recover files uploaded by other users, as the GET /files/:id/:name route in app/controllers/files.js only enforces login authentication without consulting room membership or the Room.canJoin check.

Database specific 
{
    "cwe_ids": [
        "CWE-862"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/66xxx/CVE-2026-66750.json",
    "cna_assigner": "VulnCheck",
    "unresolved_ranges": [
        {
            "source": "AFFECTED_FIELD",
            "extracted_events": [
                {
                    "introduced": "55e8833974c83559ed2cbc12bc15febeb2466254"
                },
                {
                    "last_affected": "617207ff3c0c0bf8e3c7a915bd9ec03f1dd8390c"
                }
            ]
        }
    ]
}
References

Affected packages

Git / github.com/sdelements/lets-chat

Affected ranges

Type
GIT
Repo
https://github.com/sdelements/lets-chat
Events
Introduced
4795dc006f2c820bb11f3e9b5256017830f274db
Last affected
a5e8b2d5977fedc167e1efb03a4f80121da4842e
Database specific 
{
    "source": "AFFECTED_FIELD",
    "extracted_events": [
        {
            "introduced": "0.3.0"
        },
        {
            "last_affected": "0.4.8"
        }
    ]
}

Affected versions

0.*
0.3.0
0.3.1
0.3.2
0.3.3
0.3.4
0.3.5
0.3.6
0.4.0
0.4.1
0.4.2
0.4.3
0.4.4
0.4.5
0.4.6
0.4.7
0.4.8

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-66750.json"