CVE-2026-63101

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Source
https://cve.org/CVERecord?id=CVE-2026-63101
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-63101.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-63101
Published
2026-07-17T15:51:06.118Z
Modified
2026-07-19T03:47:18.751498298Z
Severity
  • 8.7 (High) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N CVSS Calculator
Summary
Open Event Server 1.19.1 Unauthenticated Member Roster Export via CSV Export Endpoint
Details

Open Event Server through 1.19.1 contains a missing authentication vulnerability that allows unauthenticated attackers to export the complete member roster of any group, including email addresses, names, join dates, and roles, by submitting requests to the group followers CSV export endpoint which lacks any authentication decorator. Attackers can enumerate sequential group IDs via brute-force, trigger an export via the unauthenticated POST endpoint, then poll the unauthenticated task status endpoint until completion to retrieve a download URL containing the full member CSV.

Database specific 
{
    "cwe_ids": [
        "CWE-306"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/63xxx/CVE-2026-63101.json",
    "cna_assigner": "VulnCheck"
}
References

Affected packages

Git / github.com/fossasia/open-event-server

Affected ranges

Type
GIT
Repo
https://github.com/fossasia/open-event-server
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Last affected
745c030cbdc51208232ff5eba6c6dd264b90aedf
Database specific 
{
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "last_affected": "1.19.1"
        }
    ],
    "source": "AFFECTED_FIELD"
}

Affected versions

v1.*
v1.0.0-alpha
v1.0.0-alpha.10
v1.0.0-alpha.2
v1.0.0-alpha.3
v1.0.0-alpha.4
v1.0.0-alpha.5
v1.0.0-alpha.6
v1.0.0-alpha.7
v1.0.0-alpha.8
v1.0.0-alpha.9
v1.14.0
v1.15.0
v1.16.0
v1.17.0
v1.18.0
v1.19.0
v1.19.1
v1.2.0

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-63101.json"