CVE-2026-121562
mediumCTFd 3.1.0 before 3.8.7 contains an information disclosure vulnerability in the /api/v1/teams list endpoint that exposes non-public team custom field values.
CTFd 3.1.0 before 3.8.7 contains an information disclosure vulnerability in the /api/v1/teams list endpoint that exposes non-public team custom field values. Unauthenticated attackers can paginate GET requests to collect hidden registration data such as emails, phone numbers, and student IDs when team mode and public visibility are enabled.
CVSS
5.3
5.3 (CVSS v3.1)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N Severity source: NVD CVSS v3.1 (disclosure@vulncheck.com)
Timeline (UTC)
Published: 2026-11-03 16:17
Modified: 2026-11-03 16:30
NVD status: Deferred
Last synced 1 day ago
Verified against the source API 2026-11-03 16:50 UTC
Exploitation
Not listed in CISA KEV (as of last catalog sync)
Absence from KEV does not mean a CVE is not exploited. Exploitation status: unknown (no authoritative evidence in our sources).
Affected products
Not reported by the source (unknown — not "none").
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
No vendor advisory or patch reference tagged by NVD. Check the references below.
References
- https://blog.ctfd.io/ctfd-3-8-7/ disclosure@vulncheck.com
- https://github.com/CTFd/CTFd disclosure@vulncheck.com
- https://github.com/CTFd/CTFd/blob/3.8.6/CTFd/api/v1/teams.py#L128-L131 disclosure@vulncheck.com
- https://github.com/CTFd/CTFd/blob/3.8.6/CTFd/schemas/teams.py#L336-L363 disclosure@vulncheck.com
- https://github.com/CTFd/CTFd/commit/122c224030224ca6a04d2928280055a84bbd4850 disclosure@vulncheck.com
- https://github.com/CTFd/CTFd/releases/tag/3.8.7 disclosure@vulncheck.com
- https://www.vulncheck.com/advisories/ctfd-3.1.0-before-3.8.7-information-disclosure-via-ap... disclosure@vulncheck.com
Data sources
NVD CVE API 2.0 — fetched 2026-11-03 16:50 UTC · record ↗