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Back to active CVEs
Medium · CVSS 6.9CVE-2026-121562

CTFd 3.1.0 before 3.8.7 Information Disclosure via /api/v1/teams EndpointCVE-2026-121562

Answer in brief

CVE-2026-121562 records a Medium severity (CVSS 6.9) vulnerability in CTFd 3.1.0 before 3.8.7 Information Disclosure via /api/v1/teams Endpoint. The current sources do not mark it as known exploited. The current feed maps CTFd/CTFd (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Nov 3, 2026Updated Nov 3, 2026Source checked Nov 3, 2026First seen by HOL Nov 3, 2026Material review Nov 3, 2026
Upstream Advisory

Key facts

Risk
Medium · CVSS 6.9
Exploitation
Not marked as known exploited
Affected software
1 mapped package or product
Fix availability
Available

Why this deserves its current priority

CVSS is 6.9. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps CTFd/CTFd (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
CTFd/CTFdgeneric>=3.1.0 <3.8.73.8.7

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for CTFd/CTFd.
  2. 2Review the reported fix. Update CTFd/CTFd to 3.8.7 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

  1. Published upstream

    Nov 3, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Nov 3, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Nov 3, 2026

Sources and claim methodology

  • Source referenceblog.ctfd.io
  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • Source referencevulncheck.com
Upstream source description

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.

Quoted source text, attributed separately from HOL analysis.

Record context

Vulnerability class
Missing Auth
EPSS
Not reported
CWE IDs
CWE-863
Source
CVE List V5
Source checked
Nov 3, 2026
References
7 linked sources
Open source record