CVE-2026-109564: LearnHouse before 1.4.0 Missing Authorization via Playground Duplicate Endpoint

Severity: low (CVSS 3.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-10-12 · updated 2026-10-27
Weakness: CWE-862

Description

LearnHouse before 1.4.0 contains a missing authorization vulnerability in POST /api/v1/playgrounds/{uuid}/duplicate that skips the read-access and draft checks enforced by get_playground. Authenticated users with playground creation rights, such as Instructors, who know a RESTRICTED or unpublished playground UUID can copy its html_content and republish it publicly.

Affected products

LearnHouse: before 1.4.0 — fixed in 1.4.0

How to fix

Upgrade to a fixed version: LearnHouse 1.4.0. Check the vendor advisory for mitigations.

References

https://github.com/learnhouse/learnhouse
https://github.com/learnhouse/learnhouse/commit/9a1319185a596ea9b40651dbfd96f05195c0be37
https://github.com/learnhouse/learnhouse/pull/1120
https://www.vulncheck.com/advisories/learnhouse-before-1.4.0-missing-authorization-via-playground-duplicate-endpoint

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