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TI-2026-74506 Aliases CVE-2026-71854

Unauthenticated access to OpenAEV player lessons API exposes answers

Priority MEDIUM 41CWE-306Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Security bypass
Confidentiality · integrity · availability
High · Low · None
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-306.

Summary

The OpenAEV platform before 2.260622.0 exposes its player lessons endpoints on a default installation without requiring authentication (CWE-306). The endpoints trust a client-supplied user ID and do not verify that the caller is that user or a member of the exercise. An unauthenticated remote attacker who knows an exercise UUID can read lessons learned questions and answers, including answer authors, and can create or overwrite answers attributed to any user.

Written with Claude Haiku 5.5 from the sources below · 2026-11-06

Description from the CNA

OpenAEV is an open source platform allowing organizations to plan, schedule and conduct cyber adversary simulation campaign and tests. Prior to version 2.260622.0, on a default installation, the `/api/player/**` lessons endpoints can be called without authentication, and they trust a client-supplied `userId` query parameter without verifying that the caller is that user or a member of the exercise. An unauthenticated client that knows an exercise UUID can read lessons-learned questions and answers (including each answer's author identity) and create or overwrite answers attributed to an arbitrary user. Version 2.260622.0 contains a patch.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00245 15th percentileScored 2026-11-07
Fix Fixed openaev (OpenAEV-Platform): 2.260622.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
OpenAEV-Platformopenaevbefore 2.260622.02.260622.0Patch availableCNA
  • openaev VendorOpenAEV-Platform Affected before 2.260622.0 Fixed in 2.260622.0 Patch available CNA

Remediation

Upgrade OpenAEV to version 2.260622.0, which contains the patch.

Written with Claude Haiku 5.5 from the sources below · 2026-11-06

  • Fix · CNA openaev (OpenAEV-Platform) Fixed in 2.260622.0

Vendor assessments

Red Hat

Red Hat's page for this CVE →

Not affected: 1 product
  • Red Hat

Timeline

  1. 2026-10-15 Threatist record created from CVE-2026-71854
  2. 2026-10-16 CISA SSVC decision points changed
  3. 2026-10-16 Priority changed: MEDIUM → LOW
  4. 2026-10-16 Priority changed: LOW → MEDIUM
  5. 2026-11-06 Affected versions changed · Red Hat
  6. 2026-11-06 CVSS score added · Red Hat

References

Other 1

  • TI-2026-19723 OpenAEV Vulnerable to Username/Email Enumeration Through Differential HTTP Responses in Password Reset API CVSS 3.1MEDIUM 5.3

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences